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。Astronaut Roy McBride (Brad Pitt) travels to the outer edges of the solar system to find his missing father and unravel a mystery that threatens the survival of our planet. His journey will uncover secrets that challenge the nature of human existence and our place in the cosmos.