The body of a man involved in recovering sunken treasure is discovered pinned to the wall of his new cabin cruiser by a bloody spear fired from a speargun at close range.

When a teen tennis phenom is abducted from her bedroom, the investigation leads to the waterways when a girl's arm is recovered in the belly of an alligator. Delko calls for an expert—his old college buddy and now alligator expert Jeff Corwin to assist.