一名轻度自闭的航天工程师罗伊，他的父亲在20年前离开地球前往海王星，寻找外星智慧生物。不料任务失败，有去无回。而罗伊此次也要飞越太阳系，找到父亲，并查清当年失败的原因。
卡通中的超级英雄太空超人终于跃上大银幕了！在这部真人版的太空超人中，老冤家幽灵王当然是不会缺席，这次两人为了要抢夺一把时空钥匙，而展开一场惊天动地的大战，因为这把钥匙的拥有者，将有能力控制时间与空间。
British Army radiation drills at a remote Scottish base attract a subterranean, radioactive entity of unknown nature that vanishes, leaving two severely radiation-burned soldiers... and a "bottomless" crack in the earth. Others who meet the thing in the night suffer likewise, and with increasing severity; it seems to be able to "absorb" radiation from any source, growing bigger and bigger. What is it?? How do you destroy a thing that "feeds" on energy?
