Suzuko Homura returns to her hometown for the first time since elementary school, recalling her friend Chinatsu Morikawa who she hasn't been able to contact. As Suzuko struggles to make friends at her new school, she decides to learn the WIXOSS card game that is popular with her classmates. Just then, Suzuko's LRIG, who she names Riru, speaks to her, revealing that she will take part in Selector battles against other chosen players...