A terrible storm comes to Rosewood, and all of the students are trapped in school. Emily reveals a secret after she's accused of killing Alison. When Aria is about to give Noel a chance on dating her, Ezra returns. Byron leans on Ashley for advice as his relationship with Ella only gets worse. Meanwhile, Spencer discovers something that her mother has been keeping from her. And at the end of the episode, Lucas tries to tell something to Hanna, and his shoes are dirty, suggesting that he was at Alison's memorial.