Facing a lifetime in prison, Kang Eun-soo is offered a dangerous way out by the police. She and her partner Lee Kyung must lure her husband's murderer, the fugitive Jang Tae-gu, into a deadly trap. But as she fights for her freedom, Eun-soo discovers the deepest betrayals come from those she once called friends. Some lines, once crossed, can never be erased.