Detective Ina Behrendsen finds her lover, Sylt seals protector Leo Fischer, beaten to death on the beach with a car jack, soon found nearby and stolen from her car, rendering her a formal suspect. Camping around -illegally- but uncooperative are the "Nackte Robben", eco-activists who vowed to practice nudism there until tourists tours near the seals are banned and prove hard to identify 'au naturel', leader Paul Kleefeld even makes a nude run from the precinct rest room. Later Leos's buddy captain Sven barely survives an explosion caused by sabotage -no first- of his fishing boat's fuel plumbing. Leo was allegedly estranged from Leo's parents Franz and Lara (Siever's ex) who run the Westerland taxi firm with his brother Max, who hides having given Paul and his lover a lift, and more. Even Hinnerk doubts Ina's innocence as Leo cheated on her with wealthy local Bea Fender.