The team scrambles to locate a missing relic before their rival agents do. Deep in the ghost-hunting underworld, danger lurks around every corner.

The jarred skull leads Lucy to Bickerstaff's home. The team accepts an invite to the Fittes ball, hoping to snag a rare book from the company library.

With George and Flo on standby, Lucy and Lockwood infiltrate a black market auction where members of the underworld will bid on a priceless artifact.