During another illegal rave party in a restored WW II air shelter bunker, the corpse is found of utilities contractor Gero Kimmich, whom conservation society president Walter Schiller regularly hired, but not then. Schiller adds Gero hated the untidy parties as well. IT-Spezialist Rico Sander identifies on Internet illegal party organizer Philipp Burgemeister, who denies having been there but his flash light is found, with fingerprints, yet maintains he found Kimmich already dead, while he also kept from the police dating the contractor's unruly teen daughter Lucy Kimmich. Philipp's wife Suse cashes a fat life insurance, enough to pay the family's debts, and she bought the murder weapon. FInally a whole other angle is added: Gero Kimmich was about to tear open a wall behind which a skeleton is found, stabbed during the 1960s, when restoration was started by the Scillrs and some friends, including his love rival Thomas, who matches the corpse.
—KGF Vissers