The strange death of an Englishwoman abroad takes Morse and Lewis to the city of Verona in northern Italy. Morse takes delight in open-air opera in the Roman amphitheatre and falls under the spell of Nicole Burgess, a glamorous opera singer. But Lewis is home-sick.

Morse's step-niece commits suicide, and he takes compassionate leave. He starts to research her past to find the reason for it, and this confronts him with the generation gap. His investigation into the young girl's death leads him into an alien world of teenage hedonism: house parties, raves and designer drugs.