Luke's sister shows up at the Jade Wolf claiming innocence about the recent attack. But with Luke not trusting a word Cleo says, he finds himself at odds with Clary who sees an opportunity to get to Valentine. Meanwhile, Simon gets dating advice from a surprising source as Isabelle takes a dangerous path.
Alec and Magnus offer to host a celebration in honor of Max's first rune.
Magnus's life is on the line when Azazel helps Valentine escape the Institute by swapping Magnus's and Valentine's bodies. Jace learns the truth of his family.
Sally learns more about the Reaper, an old friend pays Josh a visit, and Aidan does whatever it takes to save Henry’s life.
Liam tries to pit Josh and Nora against Aidan, Sally gets closer with Max at the funeral home, and Kenny suspects that Aidan may be a vampire.
