Psylocke's reunion with her brother, Captain Britain, takes a turn for the worst when the diabolic minds of several of Excalibur's greatest foes decide that one world is not enough to conquer. The Exiles and Excalibur must join forces to save crosstime before all of creation is destroyed! Collecting X-MEN: DIE BY THE SWORD #1-5.
— Description from Comic Vine community (comicvine.gamespot.com).
