In this dark comedy thriller, A Simple Solution follows three Iranian sisters—PEGAH, SARAH, and NEGIN—as they grapple with the aftermath of Pegah’s shocking murder of their abusive father. Faced with Iran’s oppressive legal system, Sara and Negin must protect their unhinged sister and dispose of the body. But their plan spirals out of control when an intrusive neighbor also meets a violent end. As they navigate this grim situation, the sisters unexpectedly find a twisted sense of catharsis and bonding in their gruesome task. By the end, they bury their past and, for the first time in weeks, Pegah finally finds peace in sleep.