Can twin sisters sense each other? In any case, Marie feels Amelie. While the one sister is already on her way home from their birthday party, Marie, who stayed longer, suddenly collapses on the dance floor. That night, Amelie never arrives home and disappears without a trace. Her friend Jonas alerts the police the next morning, worried that something must have happened. Chief Inspector Ingo Thiel immediately begins the investigation, but for the time being he and his SOKO team are groping in the dark: no witnesses, no enemies, just an earring found in the park. But then Marie notices that something is missing from the couple's apartment: a striking patchwork blanket that Marie had given her sister. Thiel is certain: Jonas is hiding something. So does he have something to do with the disappearance of his girlfriend?
When Willi's father is abducted and is only released for a valuable statue from his art collection, Tim is the only one who believes Willi that the police are on the wrong track. Together with the smart policeman's daughter Gaby and the highly intelligent outsider Karl, they start to investigate on their own. Against all odds the four discover a conspiracy. In the course of their first big detective adventure they grow together into a committed community, and so Tim, Klöschen, Karl and Gaby become the band TKKG.
11-year-old Michi lives in a children's home, every day fighting to win the respect of the other kids, till the day he finds his real dad, Tom - who happens to be a dwarf, even shorter than Michi is, the opposite of his idea of manliness and strength. When the kids find out, Michi's life becomes hell and he flees. With nowhere to go, he moves in with Tom, who is new to this fatherhood thing, while Michi tried to hide his embarrassment and shame from his fellow school kids. This forces Tom, who had coped well till now, to confront his handicap head on. As time passes, they discover they have more in common than other sons and fathers, until their relationship is again suddenly put to the hard test...