Jogging in the late evening, unemployed Alexander Koch is beaten up, taken home and patched up by his steady girlfriend, surgery assistant Maren Liek, who wakes up next to his corpse. He died from internal bleeding, but hours then then her story. He stayed in a Melanie Petri's measly Wismar motel, where he systematically filmed by hidden camera his one night stands in bed with many women, and blackmailed several married ones, including constable Lars's butcher Carsten Jensen's wife Petra. Maren's employer's surgery proves the link between his victims.
—KGF Vissers