Case of the Ostentatious Otters

During a road trip to Monterey, CA, Zack, Jillian, and their two corgis, Sherlock and Watson, find themselves investigating the mysterious death of a scuba diver. Their quest for answers grows more intriguing with the playful otters that seem to be using gold coins as tools for shellfish. As they delve deeper, questions arise about a potential connection between the diver's death and a sunken treasure ship along the coast.