The three of you scramble out of the hatch and spill into the airlock. Beyond that is a spacious junction where the airlock meets with a narrow hall.
Opposite the airlock is a cobbled-looking protocol droid, near the wall.
"My Master bids you welcome," it chirps. "Now, if you will follow me, I will take you to see him."
Excellent. Then you are all together when the ray shields are activated and you are trapped in a wibbly cone of energy.
Funny... you did not sense the trap before it was triggered.
The protocol droid stands outside of it, having been just ahead of you.
"Forgive me, but my Master requested that I lure you into confinement," it says politely. "The ray shields are mobile and will escort you to the desired location. Please stay ahead of the rays, or you will be vaporized. Thank you."