影片根据导演布莱克周遭的真实故事改编，此前曾改编为一部同名短片。影片描绘曼德薇饰演的年轻母亲，努力拯救她14岁的儿子，使其脱离全国性的毒品销售企业。迪金森则饰演一个专门利用脆弱少年，并将他们带到英国县界的帮派招募人员。

A young woman enlists in an underground game of pain endurance in the hope of winning the million dollar prize. She soon learns the real opponent is the man who's running the game, as he employs horrific methods to manipulate and defeat her.