Ex-con Luc Paulus firmly resents any comment from her teacher Hilde De Bont about his good-for-nothing daughter Katrien's alcohol abuse and other oddities such as lots of cash. Tibo resisted his lover Nadia's saucily abusive demand to abuse police authority to lean on Paulus. Shortly after, his skull is smashed fatally. The team suspects former jail-mate Martin Coopman, now his partner in a window cleaning business, who actually fired him recently. Then they discover family and intimate secrets, yielding more suspects to be eliminated by alibi or forensics.
