In the wake of a violent storm, a Rhode Island harbormaster finds a badly decomposed body aboard a sailboat. Now, detectives must uncover the truth: Was the killer Mother Nature or a more nefarious force?

After a mysterious 911 call leads police to a riverboat engulfed in flames, they fear the call may have come from inside the vessel. As the smoke settles, detectives must determine if the blaze was accidental or intentional arson and murder.