Long-lost twins Emma and Sutton separated under mysterious circumstances. Sutton was adopted by the wealthy Mercer family in Phoenix, while Emma grew up in the foster system. When the twins reunite as teenagers, they keep it a secret. While Sutton goes in search of the truth, Emma takes over her life and discovers more secrets and lies than she could have imagined.

As the twins' saga continues, there are more surprises, secrets and lies. The girls' recently revealed birth mother Rebecca lures Sutton into her plans for the Mercer family. Emma grows closer to Thayer, while still being drawn to Ethan, who has started to reconnect with Sutton. Kristin feels betrayed after Ted came clean about his long ago affair with Rebecca, but Ted might be hiding even more shocking revelations. And Mads connects with a mysterious new guy in town who brings a whole new level of secrets with him.