A giant round spaceship the size of Jupiter flashes in from outside the galaxy, clearly out of control, headed directly for the Earth system. Captain Friday "Disco" Franks and Captain Emma Dakota meet in a nursing home on Earth where she feeds his stroke-ravaged body three meals a day. Then the Earth Protection League tasks them with not only stopping the giant ship to save Earth, but exploring it. Another fun romp into the depths of the Earth Protection League space.