 The Imperial fleet, led by a merciless Darth Vader, hunts for the new Rebel base by dispatching probe droids across the galaxy.Luke Skywalker is captured by a wampa while investigating one such probe and dragged into the creature's cave, but manages to escape using the Force to retrieve his lightsaber.Before Luke succumbs to hypothermia, the Force spirit of his deceased mentor, Obi-Wan Kenobi, instructs him to go to the swamp planet Dagobah to train under Jedi Master Yoda.