After failing to capture Luke Skywalker during the Battle of Hoth, Darth Vader—Skywalker's father—set a trap for Skywalker on the Cloud City of Bespin. He captured Han Solo and Leia Organa to torture them, hoping to lure Skywalker out of hiding. Skywalker saw a vision of his friends' suffering while on Dagobah, where he trained with Jedi Master Yoda, and rushed to Cloud City to help them.