Myka is dealing with her cancer diagnosis, but can't manage to tell Pete about it.
Artie has some big news, and he can't give too much away with Nick standing right there, but we think it has something to do with pirates! He orders Myka and Pete to follow him, post-haste.
Pete's not bummed when Artie tells them they're going after the booty of Roaring Dan Seevy, a pirate who stole several crates being shipped from Warehouse 12 to Warehouse 13. Artie convinced a black market dealer to sell the other half of a puzzle box that will lead them to the stolen goods.
Steve is concerned about Nick, who hasn't spoken a word of truth in all the time he's been with them. He tries to warn Claudia, but she insists it's totally normal for a street kid.
You know what isn't normal for a 15-year-old street kid? Hanging out with the likes of Charlotte Dupres. The fact that she's his mother only makes it creepier.
Nick has found out about Steve's distrust, and makes a heartfelt - and honest - apology before going in for a surprise bear hug.
When the agents arrive at the meet in Buffalo, they discover their black market dealer is none other than Mother of the Year, Charlotte Dupres. In return for her half of the puzzle box, she wants one half of the treasure. Artie takes a calculated risk and partners up with her.
The clues point to the Niagara Falls power plant, but Charlotte gets wind that Artie's plans to cut her out. She one-ups him and does the cutting, first. When the team revives, they go to the plant and find the underground lair belonging to Roaring Dan, where they find not just treasure, but Charlotte's henchman, dead.
Back on the ranch, Claudia is about to take Steve to task for fighting with Nick - after he totally said he'd be cool - when an intruder alert sounds, and the two of them have to secure the warehouse. Steve thinks Nick must be responsible, but Claudia defends her ward.
Steve heads inside to make sure no one's hiding in the Bronze Sector while Claudia keeps an eye on the vitals, but when Steve cries out, Claudia blazes in to find Marcus, the man formerly kept alive by the metronome! She gets away from him only to find Steve, bronzed.
Myka finds Charlotte and kicks her behind before learning that something else is down there with them. As she learns this truth, so do Pete and Artie when that something attacks them! They manage to fight it off with copious noise, and when Myka and Charlotte rejoin them, they deduce that the ghost is protecting Seevy's treasure.
After the smokey ghost kills Charlotte, they know that this must be Dan Seevy's ghost, and set about looking for the artifact that allowed him to project his own spirit after death. They find it in Dan's own hand, and when they go to bag it, the spirit attacks the three of them at once!
Claudia manages to bypass Artie's DNA lock on the bronzer, but in so doing, discovers one of Franz Mesmer's magnets, an artifact that makes the holder exist in a fantasy of another's design, in her pocket. She calls Jinks to learn that he, too, has been whammied - he's been in the B&B the whole time!
The only thing that can save Artie, Pete and Claudia from Dan's ghost is.... Charlotte? But she's dead! As she informs them, she's been dead several times. As Sutton's wife, the same process that was used on him was used on her, and the Philosopher's Stone made them, as well as their son, Nick (yes, THAT Nick), immortal.
When Myka learns that Charlotte wants to return to a mortal life for herself and Nick, she can't ignore her own fears of death any longer. Myka finally tells Pete the truth of her cancer, and he wraps her in a brotherly embrace.
Charlotte's revelations don't stop there: she and Nick were planning to infiltrate the Warehouse in order to free Paracelsus, but the plan went off the rails. As Jinks soon tells them, after being returned to life, Paracelsus bronzed Claudia, then broke the bronzer.