After a convicted felon agrees to expose a crime syndicate's dirty laundry before a Senate committee, he learns that a Mafia "hit" has been placed on his life, and he is wounded in an ambush en route from the penitentiary.

Hondo and his team go after a gang of jewel thieves who make their getaways under water.

Hondo and his team close in on the gang that has been committing robberies using SCUBA gear.