An American couple, Paul and Marianne, spend their vacation in Italy and experience trouble when Marianne invites a former lover and his teenage daughter to visit, which leads to jealousy and dangerous sexual scenarios.
A small Sicilian town elects a new, honest major but quickly learns that playing by the rules is not as easy as it seems.
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.
