Chief Inspector Thiel and Professor Boerne are confronted with a case that puts their professional and personal relationships to the test. After a party at the Münster Medical Faculty, the body of student Chris Haffmeister is discovered. Chris has been stabbed. A possible motive: He had access to the university housing exchange, a sought-after resource for students desperately searching for affordable housing. When a second murder occurs, Boerne and his students finally conduct a groundbreaking experiment that sheds light on the mystery...