Down on luck and desperate for dough, Texas drug dealer Chris (Emile Hirsch) concocts a plan to kill his estranged mother and cash in on her life insurance. Reluctant to do the dirty work himself, Chris hires contract killer (and police detective) Joe Cooper (Matthew McConaughey) to carry out the hit, but soon discovers he and his dad (Church) can't afford the sizeable fee. Ice-cool Joe negotiates an agreement for the company of Chris's younger sister Dottie (Juno Temple) as a retainer, but when the family discover a mystery man has been named as the policy's beneficiary, their plan spins viciously out of control.