When an evil spirit known as Pitch lays down the gauntlet to take over the world, the immortal Guardians must join forces for the first time to protect the hopes, beliefs and imagination of children all over the world.

After flying home to L.A. for the funeral of his estranged record-producer father, a struggling man discovers that the will stipulates that he must deliver $150,000 in cash to a 30-year-old alcoholic sister he never knew existed, and her troubled 12-year-old son.