Muramasa's Spiritual Pressure begins attracting other Hollows to the World of the Living, forcing the Thirteen Court Guard Squads to team up with their own Zanpakuto to fight them while Ichigo struggles within Muramasa's own mind to defeat him. Afterward, the Soul Reapers are tasked with a new mission to find and hunt down rogue Zanpakuto's known as Sword Beasts.