He agrees and signs off, heading for the cabin after debating whether or not to leave a note behind. He doesn't, in the end. He doesn't know Hakkai well at all but he wants to believe him, even if instinct says this is a trap. If it is a trap he'll deserve the result, even if he can't mentally stand touching why, yet. Not if he wants to stay present and functioning.

When he arrives, he knocks.