Johnny always took comfort in knowing that no matter what trauma happened in his life, he could always retreat to the safety of his backyard and play with his Grandparents. Thanks to the miracle of cremation, Johnny’s grandparents were added to his sandbox and now served as his guardians, babysitters, and adventure companions. But, when Johnny’s mom starts dating a shady real estate developer who has designs on more than her land, Johnny and his Grandparents hatch one crazy scheme after another to save the family home.