After her brother is killed in self-defense by his ex, Madison, whom he'd kidnapped, Lisa decides to take revenge on her by using a trauma support group to become her friend.After her brother is killed in self-defense by his ex, Madison, whom he'd kidnapped, Lisa decides to take revenge on her by using a trauma support group to become her friend.After her brother is killed in self-defense by his ex, Madison, whom he'd kidnapped, Lisa decides to take revenge on her by using a trauma support group to become her friend.