Cassie and Mitch are back, and their new PI firm, Chase Investigations, has its first big case. Roman Ricardo, owner of Roman Tackle and the sponsor of one of the biggest fishing tournaments in town, has been murdered. Someone slipped a lethal amoeba into Roman's nasal spray. Now Mitch and Cassie have to figure out who did it, and their list of suspects grows as they investigate the people who last came into contact with the victim. With Mitch's dad in town, they have some extra help, but father and son don't exactly see eye to eye. Will Chase Investigations be able to catch the killer?