Corey Goltz grows up in the working-class outskirts of Boston as the only child of Gloria, whose ambitions were derailed early but who has always given her son everything she can. Corey, restless, dreams of leaving home for a great adventure.
 
Instead, when he is fifteen, the world comes crashing down upon him, when Gloria is diagnosed with ALS and, too late, his estranged father, Leonard—a man of great charisma but dubious moral character—reenters the picture. Determined to be his mother’s hero at any cost, Corey begins shouldering responsibility for her expensive medical care, pushing himself to his physical and emotional limits as her disease cruelly progresses. And as Leonard’s influence over Corey grows, Corey must dismantle the myth of his father’s genius and confront the evil that lurks beneath it.