Kai had been indeed locked in his room, guards outside his door and under his balcony so they would make sure he wouldn't try and find a way to escape. Lun had been dragged away, locked too but in the dungeon as he waited for his time to come.
They were going to execute him, they were going to have him killed for something that he didn't even do! Kai couldn't sit still, he moved back and forth, biting his nails as he tried to find a solution to all of this, a way out so his best friend wouldn't get killed.
As he laid in his bed, staring at the ceiling while his feet dangled from the mattress he sighed, no ideas popping in that smart head of his. There was just a blank, not even a fragment of a thought that could be useful. He didn't have the time to think, everything had happened so fast that he was now stuck in these tall walls with no way out and with no way of proving himself innocent.