Diabolik narrowly escapes Inspector Ginko's latest trap, leaving his partner in crime Eva Kant behind. Furious, Eva offers Ginko her help in capturing him, but the former has to face first the return of an old flame of his, noblewoman Altea.

A study of ennui and female repression within a world rarely seen onscreen - Italy's hermetic nobility.

Luce, a bright young student from a good family, falls for Loris, a reckless boy whose debts put them both in danger. She turns to Vittoria, a once-familiar friend now living in luxury, who convinces her to use erotic sites to pay off the debt. But, like dominos, every part of her life starts collapsing. The two girls won't leave until dawn, once Luce's debt is paid, but at what cost?