Julia and her friends, celebrating their high school graduation in Croatia, find themselves the targets of a masked killer who begins picking them off, one by one.

Even Franz Gasperlmaier had never seen anything like this before. He's seen a lot of things, after all, Gasperlmaier has been a police officer in Altaussee for more than twenty years. But a stabbed man on a Monday morning in the festival tent at the Altaussee Kirtag is too much even for a seasoned man like him. And so he makes a wrong decision, not his last one that day, and the dead man sitting in his own blood in the festival tent won't be the only victim.

A young Vienna-based taxi driver of Turkish origin witnesses an extremely brutal murder. The perpetrator, a serial killer, makes eye contact with her; a deadly game of cat-and-mouse ensues.

Karl meets Nini at a Berlin train station: it is love at first sight. But the few hours they spend together before she travels back to Vienna end in a mishap in which Karl loses her phone number. He decides to move to the Austrian capital to find his dream woman again.