Detective Inspector Jack Frost, officially on duty, is nevertheless determined to sneak off to a colleague's leaving party. But first the corpse of a well-known local junkie is found blocking the drain of a Denton public lavatory and then, when Frost attempts to join the revels later on, the nubile daughter of a wealthy businessman is reported missing.

Sleepy Denton has never known anything like the crime wave which now threatens to submerge it. A robbery occurs at the town's notorious strip joint, the Coconut Grove, the pampered son of a local MP is suspected of a hit-and-run offence and, to top it all, a multiple rapist is on the loose. Frost is reeling under the strain, his paperwork is still in arrears and now, more than ever, his self-righteous colleagues would love to see him sacked. But the manic Frost manages to assure his superior that all is under control. Now he has only to convince himself...