After the death of his colleague Grosz, Thorsten Falke is taking a break in the remote St. Joseph monastery when the parish pastor dies in a fire. Child pornography material is found in his estate, which confirms Falke and his colleague Eve Pötter's suspicion that the fire may have been set intentionally.

Chief Inspector Frank Thiel and Professor Karl-Friedrich Boerne are confronted with a student case that puts their professional and personal relationships to the test.

After a party at the Münster Medical Faculty, where Chief Inspector Frank Thiel and Professor Karl-Friedrich Boerne were also celebrating more or less wildly, the body of student Chris Haffmeister is discovered. He died from a mysterious stab wound. During the autopsy, forensic pathologist Boerne quickly determines that Chris was not alone in his final moments.