Flashes of light. An unseen menace. Messages from the void. Secrets at the edge of the solar system that threaten to destroy the future. Mandira Research Station beckons at the heliopause–the brink of interstellar space. After Forster sees flashes outside that no one else can, the captain of an incoming ship is attacked by an invisible foe. Forster and his enigmatic coworker Efron search for a missing daughter who might be the cause of it all. Can the team stop the force from taking over Mandira, and the entire solar system?