Alec is worried what will happen if Sutton finds out that her birth mother isn't really dead. Something really bad happened a long time ago and both Alec and Ted have been covering it up ever since.
Emma has an intense recurring nightmare (in which she can't breathe) that she discovers her and Sutton have both been having since childhood. Using the photo of Emma with her birth mother at age three, Sutton and Thayer are able to locate the burned down shell of a house where Emma grew up as a baby. They realize that the dream Emma was having was her being trapped in the house when it burned down all those years ago, and that through "twinsense" Sutton was experiencing the same nightmare. In the house they discover a mural that their birth mother signed, so now they know her name, Annie Hobbs.
Meanwhile, Justin takes Laurel on a first date where they randomly bump into Char and Mads. In order to save Ethan from being charged as an adult for stealing Sutton's laptop, Laurel falsely confesses that she was the one who stole it and framed Ethan. And Mads tries to seduce Eduardo at the dance studio.