Jess and Jace Grisham wake alone on the first day of Spring Break to an unusually quiet house. Rick Grisham is a conspiracy theorist determined to find "proof" that aliens have visited Earth and the government is covering it up. The twins realize their father may have stumbled into something real this time when a Special Ops team crashes into their house through every door and window. Narrowly escaping through a hidden basement tunnel they never knew existed, Jess and Jace set off on a harrowing adventure to find their father before those in the government-a group desperate to keep him from sharing their secrets. It turns out Rick was right all along. Humans are not alone in the universe.