Unforgiven (2003)

When Kathrin Bahro once again plays babysitter for the neighbors, a thief breaks into the house. Kathrin confronts the intruder, who escapes after a brief struggle. What remains is the dead child. Thanks to Kathrin's drawing skills, the perpetrator is quickly caught. Nine years later, the convict takes part in a Ministry of Justice project - ankle cuffs with acoustic signals are supposed to put the criminal in his place - and has only one thought: revenge...