Nori feels guilty about lying to Silas about the island's mysteries; Silas returns from a shipwreck dive and gets trapped inside a mirror.

The gang investigate when mine workers see a ghostly hand coming out of a rock, which may be someone trying to break through. They piece together sightings from around the island to find a pattern.

Emily and Sunny ingest a sap that makes them act like their seven-year-old selves. Ellis tries to protect Emily from embarrassing herself at work while the others try to find the tree needed for an antidote.