The PLL's have moved on post A.D., and they relish in their new life. Emily and Ally enjoy domestic bliss, Hanna, Caleb, and Aria have burgeoning careers, and Spencer receives a welcome visit from Toby. But there's more beneath the surface when someone comes face-to-face with A.D. for the first time. Plus, Aria's romantic relationship with Ezra is impacted by a sad revelation, Hanna and Caleb reach an impasse over Mona, and Ally tries to take her relationship with Emily to the next level. Later, A.D.'s method and identity are finally revealed.