Haunted by the events of one fateful night -- the night that saw her kill a man in self-defense -- May So (Amy Yip) struggles to survive on the streets of Macau, buoyed only by the hope of one day reuniting with the son she was forced to leave behind. When an undercover cop (Charlie Cho) agrees to help her return to her Hong Kong home, May So embarks on a brutal journey to reclaim the life that was unjustly taken from her years ago.