On a busy morning before school, the whole family leaves the house without giving Jack the dog his breakfast.

Jack the dog plays happily in his backyard with visitors from outer space, but is not so sure that he wants to go home with them. The Night Visitors are back. The family doesn't know they've come. But their dog, Jack, does. Once they land, the space creatures unhook Jack's leash. They have a grand time playing with Jack and when it's time to return to their ship, they try to take Jack with them. Fortunately, Jack's collar is not built for space travel....