Pete, Myka and Jinks deal with a prison break where the wall appears to have been melted by molten lava, and the Marshall assigned is Steve's ex-boyfriend. Meanwhile, Artie is struck deaf and Claudia must help him locate a missing statuette from Beethoven's clock before it becomes permanent.

Claudia and Steve get an intruder alert, which leads them to the shocking reveal that Paracelsus is alive and in the Warehouse. Meanwhile, Artie takes Pete and Myka to Buffalo to hunt down artefacts stolen from Warehouse 12 by Roaring Dan Seavey and his pirates centuries ago. There they find and team up with the duplicitous Charlotte Dupres whose agenda puts all their lives in danger.