Pete's ex-wife arrives in town to remarry, but an artifact may derail the wedding. Steve and Claudia visit a Civil War reenactment in search of an artifact

While Pete and his mother Jane try to determine the origins of their mysterious opponents, Myka and Claudia travel to Portland to stop a girl who can apparently vaporize anyone she hates with blasts of radiation.

While Claudia tries to help a friend and gets unexpected help, Pete and Myka investigate an artifact that causes crowds to see certain individuals as monsters... and attack them.

The team have no time to mourn a fallen comrade as they go after the person responsible, the nemesis that has been stalking Artie since he used Magellan's Astrolabe to save the world.

Pete, Myka, and Charlotte must track down Sutton, the only man who knows where they can find Paracelsus and exchange the Philosopher's Stone for the stele that will free Claudia from her bronze imprisonment... before she disintegrates.

While Pete and Steven check out a life-threatening incident at a renaissance faire, Myka agrees to help Claudia revive her comatose sister. However, they discover that doing so has unexpected consequences that threaten the warehouse and everyone in it.