An argument leads to a senseless murder in an all-night diner, putting the officers on a trail of two thrill-seeking punks who are now plotting an extortion scheme against a woman.

Sam's suspicions are aroused when a hit-and-run driver returns to the scene of the crime to confess, but no body can be found.

Suspecting that the bizarre death of a public relations man was no accident, Stone goes head to head with the dead man's ruthless boss, a powerful image maker who sets out to discredit the veteran cop.

After Dan responds to a beautiful secretary's request for help, they both wind up in the hospital near-death from an unknown poison, and Sam and Jim must search for both the poison and someone with enough motive to kill the girl.