Star Wars Episode I: The Empire Strikes Back
PLOT SUMMARY

Vader locates the Rebel base on the ice world of Hoth and prepares a full-scale attack. The rebels however are alerted to their presence and begin the evacuation. While Luke escapes successfully to meet his newly assigned Jedi Master, Yoda, on Dagobah; Han Solo, Chewbacca and Princess Leia aren't so lucky as they're pursued constantly by Darth Vader and his Imperial army.

Taken Directly From
The Ark Guide to the Star Wars Chronology