In a departure from previous episodes, the team investigates a missing person's case that turns out to be science related, not magic. With Colonel Baird out of the picture for most of the story, Cassandra, Ezekiel, and Jacob must process the scene and make some of the most difficult choices they've yet faced. Stone's protective wall begins to come down as he falls for one of the locals in a town whose residents have been trapped for 100 years after a Nicolas Tesla experiment went awry.