It is a period of unrest. Darth Vader has tracked his son, the rebel pilot Luke Skywalker, to the planet Vrogas Vas. After Vader defeated several rebel squadrons, Luke forced both Vader and himself to crash-land.
On their way to rescue Luke, Han Solo and Chewbacca discovered that Dr. Aphra, 0-0-0, and BT-1 had beaten them to him. With the aid of R2-D2, they managed to overpower Aphra and the enemy droids.
Meanwhile, upon learning Vader was on the planet with no aid, Princess Leia ordered all rebel reinforcements to assist her in terminating him once and for all. Unfortunately, Vader found the Princess first....