In the wake of the lobster festival tragedy, outside investigators arrive on Ragged Isle to find residents beset by fear and mistrust. Meanwhile, certain islanders are conducting investigations of their own.
Madame Clelia has something for Dr. Hoffman. Agent Thorne has questions for Julie. Gus has an insight for Sheriff Dalton.
Louis struggles with new responsibilities. Julie debriefs with Rose. Sheriff Dalton and Agent Thorne butt heads. Vance faces questions.
Vicki and Paul take others into their confidence. Agent Thorne gets to know Deputy Dan. Dr. Monroe checks up on Gertie.
Nearing the end, Gertie receives an urgent visit from old friends. Agent Thorne confronts a subordinate. Dr. Hoffman and Sheriff Dalton hit the books.
Trying to get to the bottom of everything that's been happening on the island, Paul escorts someone back to where it all began.