Set in a fictional London, Catastrophe (Swift) and her partner, Arsyn (Gomez), fight off a group of men in a corporate office for a mysterious briefcase. When all of the men are defeated, Arsyn betrays Catastrophe by stealing the briefcase in her hand and kicking her out of a window. Catastrophe lands on a broken car and is nursed back to health by a trio of girls called The Trinity (Steinfeld), and after some time, she is ready to start training for her revenge.