It's the last day of 6th grade A long and golden summer is ahead for Sam. He's looking forward to going on a trucking run with his Dad. Sam and his friend Big discover there is no cell phone service as they walk home.Their moms are missing. There is no power. Landline phones are not working. At first it's a fun adventure. As reality sets in, Sam and Big are challenged by a changed world. Nothing is as it was.