When a boy's father is murdered before his eyes in Central Park, Kirby takes a special interest in him. It turns out the victim was an unscrupulous book keeper with clients in an illegal gambling ring.
Lt. Kirby goes undercover on the waterfront to investigate the death of a dockworker. He discovers that the owner of a trucking company is engaged in some shady business, involving evading customs and shipping illegal cargo to China.
A friend from the west asks Kirby to investigate a threat to a girl in a nightclub sharpshooting act, which leads to a creepy blind song plugger, blackmail and a few murders.