Another group of stormtroopers

is in pursuit of

Luke Skywalker and Princess Leia. Their escape ends at an abyss.

The stormtroopers are closing in on Luke and Leia.

The stormtroopers open fire, and Leia closes the bulkhead. But there is no lock.
Luke Skwyalker blasts the door controls to lock the door.

The stormtroopers are trying to come through the door [...]