A woman claiming to be Karen's long-lost sister shows up unexpectedly on Gwen's doorstep. "Amanda" Jones and Gwen quickly hit it off, but Harve and Louise harbour growing suspicions about their mysterious guest. Also a practitioner of magic, Amanda offers Gwen a free-spirited and fun-loving alternative to Merlin's strict regimen. Faced with an opportunity to move away with Amanda, Gwen has to make a near impossible decision. Meanwhile, Josh's increasing suspicions about Gwen and Michael's relationship lead him to set up a double-date: he and Gwen, along with Tasha and Michael. But his jealousy compels Gwen to reach an inevitable conclusion: she has to do the right thing and break up with Josh. Meanwhile, Tasha – who has learned the truth about Michael's lack of feelings for her – blames Gwen, and breaks off all contact.