Senior citizen, George Eldridge returns home after mysteriously disappearing two years before and vows revenge on the aliens who abducted him. Helen, his long suffering wife, begins to question his sanity when he starts to build a space ship in his back yard with the expressed intention of returning to space to seek his revenge. What follows is a humorous and exciting adventure where the two seniors find themselves caught up in a war between two alien races and with the aid of an ancient robot, must use all of their resources in an effort to outwit both sides and survive.