Tasked with arranging his brother Max's Rune Ceremony, Alex grabs the opportunity for his family to get to know Magnus; with tensions flying, Max's big event quickly becomes an evening where they all must face their biggest fears.
When Iris activates her blood oath, Clary has more to worry about than hiding from Valentine and the Downworlders; Isabelle and Raphael get closer; Alec tries to figure out what's happening with his sister.
Jace's situation worsens when he becomes a target for the New York wolf pack, who believes that he is a killer; Raphael pressures Simon to find Camille.
Alec and Isabelle act quickly to find Jace after the Clave issues a "shoot to kill" order; Simon turns to Magnus for help when he finds himself at odds with both Raphael and Aldertree; Clary struggles to figure out where she belongs.
Everyone at The Institute prepares for the wedding of Alec and Lydia. During what should be a time of great celebration for many is far from it as they examine their relationships. Alec's parabatai should be at his side for the event, yet he and Jace are still at odds.