A beautiful woman disappears before she is to give a damning testimony against racketeer Arnie Kale in a murder trial, and Sam and Jim suspect that she has been lured into a trap.

Sam and Jim witness a boat explosion that killed a veteran cop, but their suspicions are fueled when no body can be found, and it's also discovered that the dead man was working as a private operative for an old friend who's being blackmailed.

Jim is wounded and the star witness kidnapped during the brazen courthouse escape of bank robber Donovan, and Sam must see to it that the escape plans are changed.