A Dark Fae prisoner,Raynard, escaped and showed up at the Dal. He taints the beer kegs with Gorgon blood which allows him to switch bodies. He takes over Bo's body and she is sent into Limbo. While in Limbo sees the Nain Rouge again, who warns Bo that all Fae will be eliminated unless she fulfills her destiny. It is revealed that Bo must kill Trick. In protest, Bo forces herself back into reality, but that causes everyone to switch bodies.
Raynard enters Lauren's bodies and is able to leave the Dal because she is human. She goes to kill the Ash. Dyson, in Kenzi's body, follows to stop Lauren. He is successful.
Back at the Dal, Trick finds a way to return everyone to their own body.
At the end, it is revealed that the Ash is probably an imposter, since he has the beheaded "head" of the real Ash in a trunk.