They read the letter!  “Take the light saber, put the weights on and take the pills! Thats all you need!”

Once they followed the instructions, the beam began to pulsate and all of a sudden the adventurer got dragged into it.

After a few seconds, they were in a huge underwater cave!  They were confused, because they could breathe and talk. And there was some kind of gravity. “Thats strange” the girl said “But wait, remember the weights? This is the reason we stay on the ground! Remember the Pills? That’s the reason we can breathe! But what’s our Mission?”

They walked a few steps outside the cave as suddenly a huge monster with tentacles and red glowing eyes raised in front of them!