John (Mark Strong) is a recently widowed man with the ability to enter people's memories. In the past John used his abilities to solve criminal cases, but after a stroke that left him incapacitated and financially broken, he is but a shell of his former self. Desperate for a new assignment, John asks his superior, Sebastian, for a new job. The case he receives is that of Anna (Taissa Farmiga), a troubled girl on hunger strike. While the job seems straightforward, Anna proves to be much more challenging than John expected. She's intelligent, insightful... and possibly one of the most conniving and manipulative people that he's come across in his career. As John delves deeper into her memories to discover the reason for her hunger strike, everyone surrounding Anna's life becomes a suspect - her family, her nurse, even his old mentor Sebastian himself.