A gifted astrophysicist, Dr. Lee, discovers a mysterious signal originating from a distant galaxy. As he investigates the signal, he learns that it is a beacon for a powerful alien race known as the Voidwalkers. The Voidwalkers are seeking to conquer the galaxy, and they are using the signal to open portals to other dimensions, allowing them to invade and subjugate entire worlds. Dr. Lee must rally the world's best minds to fight the Voidwalkers and prevent them from conquering the galaxy.