After learning that Cherri Bomb, Heather and Aria have occasional girl's night, Violet instantly wants to tag along, despite the three girls not wanting her to. But they reluctantly agree and they do all sorts of crazy things. But their girl's night gets interrupted when Membrane's new creation, The Mimic, crashes their party. Now not only do the girls have to face of against a robot that can mimic their appearance and combat style, but Violet has to face her own conflict.