 Steve and Dan meet up with a pair of time travelers from another planet. The two pilots wind up stealing the device the pair uses for their travels and use it to go back to the day the Spindrift crashed on the planet of the giants in order to prevent the accident from happening. However, the two time travelers have followed them and warn the pair that if they do change history there is a good chance that when the Spindrift crashes that this time no one will survive.