Wolle ist hin und weg vom Anblick des "Traumschiffs" im Hamburger Hafen. Seine Mutter und er wollten immer einmal selbst mit dem legendären Ozeanriesen in See stechen.

Wolle did a seminar and convinces the boss to try out a month-long team switch. Tariq can't stomach his sister dating anyone, even Mattes isn't safe for his 'warning' fist. Pre-teen Tim brings his kid sister Lina to hospital after a staircase fall, but she has marks from repeated beatings, which both kids, under social supervision after mother abandoned them, deny, until pressed she accuses their father, paroled petty criminal and boxer over date Mike Mitschke. His gym has its own secrets.

Tarik is in a good mood. In his divorced mother Miriam's absence, Jasper Haller (7) saw, unlike Peruvian nurse Tamin, a robber who took the jewelry and while binding with Tarik identifies him from police archive as Dietrich Specht. He admits intruding but claims there was no loot to be found. Rookie Max remains stuck in precinct, with chores and an elusive dog. It soon appears Jasper is covering for Tamin, who hides more, including a boyfriend.

After Mattes administers first aid to elderly car crash victim Sabine Ohlenschläger, she cares only to have her parole charge Jimmy Haprecht (24) arrested one, whom she claims plans a major crime, refusing to incriminate him by divulging details. She lost a lawsuit against a bank branch, whose manager Klaus Koralewski refused to refund her after falling for cyber fraud. Her other charge Maren Spieles is part of some conspiracy, concerning a robbery at that very bank, with crafty charades, but brave Mattes sees through it. Meanwhile Tariq expected more support when the state prosecutor's office examines his account being used to probably pass on secret information from the police database to organized crime.

Mattes hard-handedly arrest a red-handed-caught car thief, but Claudia recognizes her undercover former partner Gerald Renner. She helps him escape without confiding in anyone after being told he's finally setting a trap for crime baron Kurt Schellmann, only to find the police raid in his HQ fruitless do to a precinct mole. Tarik just painstakingly proved his innocence in a similar case, and won't rest until he unmasks the mole, suspecting even intern Max, who cleverly dodged Wolle's hazing prank.

Responding to a confused, broken-off cellphone call from a woman about a missing baby boy, Matthes finds her in the deer park, near the car of well-off Dana Schmied, too erratic to give useful information, paranoid about baby-thieves. Tariq gently breaks in the Schmied villa, ad finds it a mess with blood trail, but when Dana's grumpy husband Michael arrives he doesn't even know the apparent abductor of his son Jacob, searching his cellar Tariq finds Dana, restrained by two former out-patients of the psychiatric asylum where she had been therapist. Mattes braves calls to leave it to professional and gets the loon to trust him enough to give clues Tariq can follow to her cahoot Sascha Hanisch.

On dreaded stickler Wolf Haller's first day as the new precinct 21 commander, he's blackmailed byTheo Mendes, who was just released after serving 25 years, maintaining his innocence. Theo burnt a car to render credible his claim he'll murder a kidnapped innocent unless the real murderer turns himself in that day, holding Haller responsible -besides parties meanwhile deceased- for his conviction and lost life. The dynamic, demanding new chief makes a good impression on Tariq, a bad on the ER doc team and was in academy with Claudia.

The precinct mobilizes to evacuate urgently a Hamburg quarter where a sharp, never exploded WW II bomb was found on a construction site. The expert team must delay removal as several people stayed behind in a rest home. Someone knocked down the caretaker and stole valuables. Tariq's partner's father Karl-Heinz Rufenberg, who just migrated back from Brazil, is found lurking but also provides crucial clues. Surprisingly, cold cases prove key.

"Wheel Devils"-biker Ingo Beuters, a rocker, was badly wounded when deliberately crashed by car, but nobody wants or dares to talk to the police, not even his Brazilian fiancee student Giovanna da Luca. While Hans's team investigate theories, focusing on "Wheel Devils" Harald Wenners and Frank Hamann, who intimidate everyone away from Ingo in ER, they find the criminal biker gag was involved in corruption and the port's red light district. A key person is kidnapped.

Impopular, shifty, erratic 'deadbeat' ex-junk with a record Marc Böll is accused by his neighbors -except a crone he alone helps out- of shooting with an alarm pistol at one of them, but is cleared by forensics despite owning a pistol and having fled. Complaints are filed by the victim and the building owner, Lutz Steinhoff, who count on help from Claudia as former hippie days protest buddy. But are found to have ulterior motives to want Marc out of the way. Tariq meanwhile wrestles with boss Haller expecting him to reschedule his Turkish mates team's reservation in the sports hall.

Hamburg mayoral candidate Harald Brodersen's home is the latest to be wrecked, during a party his brat daughter Scarlett gave in his absence, by a ape-masked bunch which struck repeatedly the last months, but this time Scarlett's best friend Bianca was pushed down a staircase, needing hospitalization. Tarik and Hans first suspect Fred Schirmer, a known anti-establishment vandal but get suspicious when Harald Brodersen, who claims nothing was stole from his broken-up desk, turns uncooperative and publicity-shy. He's on good terms with captain Wolf Haller but is also suspected of corruption. Then Scarlet is kidnapped.

Hans cautiously and Franzi glowingly testifying in favor of troubled youth rehab program charge Zlatko Tesic who is about to be tried for robbery with injury of Maria Büttner, the girl friend of Kevin Assmann, bitter crime rival of the Tesic family, only her absence causes a delay. *. Tarik and Claudia find and hospitalize Maria just in time to prevent a toxic cocktail suicide attempt succeeding. Working out her motivation changes everything.

Mattes Seeler tries to break up a row outside a disco club where the ex-con bouncer refused drunks entry, then chases Henner Paulsen, the vandal who accidentally scratched his partner Melanie by throwing a beer bottle, but reports half an hour later having lost him and incurred mild damage in a fall. Shortly after the knave is hospitalized, badly beaten up, and timidly claims it was a uniformed cop, tagged Seeler. The collegiate support in the precinct is tested when Mattes admits having lied to cover up an embarrassing episode, not abuse, but captain Haller must treat the complaint by the book pending an IA case, next suspend Mattes for ignoring being taken off the case with desk duty. Luckily mates sleuth on working with synthetic drugs and other secrets kept by people linked to Henner, like mate marked ans his girl, and/or to the club.