The crew of Commander Walker, Captain Anderson, and Lieutenant Colonel Grey embark on a covert mission to the moon, with Walker and Anderson landing while Grey remains in orbit. As they gather samples, they stumble upon human footprints and the remains of a Soviet cosmonaut, only to discover they're not alone and are faced with an unsettling presence.

Apollo 18
A NASA mission to the moon, Apollo 18, was cut short after a mysterious discovery was made, leading to a decades-long pause in U.S. lunar exploration.