Yavin 4 had been discovered so they fled, three years later and it's Hoth where rebels tread, Luke Skywalker's on patrol, when a Wampa takes control, leaves him hanging in its cave to have with bread. He escapes into the blizzard and the cold, has a vision from a friend where he is told, seek to train from Master Yoda, find him on planet Dagobah, Han arrives, and slips him in a Tauntaun fold. A droid informs the Empire what it's found, leaves the rebels little time to hang around, first protect the energy field, that provides the bases shield, as off to Hoth, Imperial forces bound.

It's a game of cat and mouse, as the rebels seek to avoid capture and Luke develops his Jedi skills while learning some pertinent family history but becomes a little less dexterous (for the time being).