David Wallat is an experienced and respected police officer at the LKA. When the child murderer Joseph Maria Hagenow is released after a long prison period, Wallat volunteers to monitor Hagenow together with his colleagues Lisa and Eric – because Wallat still has a unfinished business with Hagenow, whom he brought to justice at the time. Hagenow is still considered dangerous, but had to be released after his arrest for legal reasons and is now under observation. Hagenow moves to a small village where Pastor Berkenbusch, who believes in the good in people, has offered him a place to stay. The policemen move into an apartment opposite the rectory. Wallat soon realises that the manipulative Hagenow is trying to undermine the guards by starting to play psychological games with the policemen, to provoke them, to play them off against each other, to draw them out. Hagenow’s tricks show little effect at first – but then it is Wallat’s mistake of all things that leads to escalation: A child disappears, the villagers find out who has moved into the vicarage, events turn upside down and Wallat is in danger of losing control of the entire operation…