With the death of Valentine everyone thought the battle was over. It looks like Simon is having more trouble then just juggling two girlfriends. Jace is still struggling with his past and nightmares frighten him into staying away for Clary. Simon’s mark shows its true power when an attempt is made on his life. Attacks against Shadowhunters start an investigation. It seems someone isn’t happy about the Accords. When someone is captured for the crimes and it appears that an order was given. With everything going on the pieces don’t start to come together until the enemy has the upper hand.