Every 179 days Robbie forgets everything. He knows this because last time it happened he wrote himself a letter explaining it. The disorientation. The fear. The bizarre circumstances imposed by the rare neurological condition he lives with. To cope with his recurring loss of identity Robbie leads a solitary, regimented life. He speaks to no one if he can avoid it, and works to complete a strange herculean task set for him by his former self. And then, with twelve days left before his next forgetting, Julie invades his life. Young, beautiful - the only woman he can ever remember meeting. As the hour draws near, Robbie is forced to confront the fact that his past is very different from how he had imagined it. And when Julie reveals her own terrible secret, he must find a way to come to terms with the truth about himself.