Camille Gardener is a grieving --- and angry --- mother who, five years after her daughter’s death, is still obsessed with the privileged young man she believes to be responsible. When her rash actions draw the attention of a secret group of women --- the collective --- Camille is drawn into a dark web where these mothers share their wildly different stories of loss, as well as their desire for justice in a world where privilege denies accountability. Fueled by mutual rage, the collective members devise and act out retribution fantasies via precise, anonymous, highly coordinated revenge killings. As Camille struggles to comprehend whether this is a role-playing exercise or a terrifying reality, she must decide if these women are truly avenging angels or monsters.