As the investigation heats up, the police search for missing items that could prove crucial. Later, a break in the case leads to an arrest.

Kieran searches for evidence and sneaks into a neighbor's home with his friends. Later, he confesses an old secret to Mia.

Mia discovers new evidence, and learns of a past incident that might connect to the case – and raise troubling questions about the two men that died.

Old mysteries unravel as Kieran visits the caves to piece the clues together. Can Evelyn Bay finally put the past to rest?