The story follows an alien suit, taken from the crash at Roswell in 1947, that the government has been unsuccessfully trying to reverse engineer. The suit is stolen by NSA agent Simon Bane, but lost in a free-fall from a helicopter and found by 12-year-old Myles, who mistakes the suit for a particularly cool Halloween costume. Superhero-style adventures follow - at the urging of Myles' friend and crush, Brittany - as Myles learns the powers and limitations of the suit while avoiding Bane.