Medical student Paula wins a place at an exclusive Heidelberg medical school. When the body of a young man she met on the train turns up on her dissection table, she begins to investigate the mysterious circumstances surrounding his death.
Tommie and Mario travel to Mallorca in search of a vacation fueled by alcohol and the desire for women and parties.
A who-is-it setting in the claustrophobic corridors of an abandoned and locked-off office building that has several guests invited to a party by their mysterious, unknown host. Only it is they who are the victims of their crimes. Suspense and mistrust are not the only stalker in this cat and mouse game of wits and fear. Who is the stalker? Why is he killing? And what is it exactly that everyone here has in common?
