Shay Barron is not afraid to be herself, or to be criticized for it. When she meets Forrest Rivers, he realizes that the hard way: She steals his milk. Forrest falls for Shay, surprising even himself. But Shay is already taken, by Westley Harrigan, who might just be the worst boyfriend ever. No one who knows them can figure out why they're still together. Westley and Shay's relationship takes a turn for the worse. Although Maddie and Jasmine didn't know what occurred, they take Shay out for a Girl's Night. Something goes terribly wrong, and Shay wakes up in the body of another girl--Serena Magnus. Shay's logic is that if she's in Serena's body, Serena must be in Shay's body. But where is Shay's body? Will Shay --or Serena-- ever be able to go back to normal? But a shocking discovery changes everything, and both Shay and Serena's lives may never be the same.