After a man is fatally stabbed during a séance, and no weapon is found, Shepherd digs into the eerie incident to catch the murderer. Questioning if supernatural forces were involved, the team must separate superstition from reality.

A science teacher mysteriously dies ziplining while staffing a leadership camp for teens. But after the victim's past reveals a web of uneasy alliances and rivalries, Shepherd must cipher through a long list of suspects.