When Roxanna is awakened by mysterious interdimensional beings called `Visitors` who implant coordinates directly into her mind, she and her sisters Ella, Eileen, and Helena embark on a mission that leads them to stash gold bars in a Civil War-era cave and travel to New York. There they discover that Commander Beaker and therapist Melanie—key figures from their previous supernatural operations—have had their memories completely wiped, forcing the girls to kidnap the only remaining witness, Agent Remmick, to help uncover the conspiracy behind the mind-wipe coverup.