luke skywalker has joined the rebel alliance and is on the ice planet of hoth. while outside the base, luke is attacked by a wampa. after escaping the wampa, luke is weak and hurt. he sees the image of obi-wan kenobi. he tells him to go to the planet dagobah to be taught by the jedi master yoda. luke is saved by han solo. shortly after, the empire attacks the rebel base on hoth. the rebels leave the base. luke takes r2-d2 in his x-wing and the two travel to dagobah. they make a crash landing on the swamp planet and go looking for yoda. luke soon finds yoda, but yoda does not think luke should be a jedi. luke convinces yoda, and the old master starts to teach luke. luke faces difficult things to do. before he completes his training he has a vision of the future. in it his friends were being tortured. although yoda, and the force ghost of obi-wan warn him not to leave, luke goes to cloud city. when he gets there he sees that it was a trap set by darth vader. the two then get into a lightsaber battle. vader cuts off luke's hand and then tells luke that he is actually his father, anakin skywalker. vader gives luke the choice to join him but luke says no and jumps off the platform. he is rescued by leia and taken to a medical spaceship, where his hand is replaced.