Something about Tarn's voice makes him take a quick in-vent, makes it harder to tell himself to walk away. His fingers curl slightly against the door;

"Tarn. Let me see."

It's not a physician's demand. It's a plea. Why the hell is he pleading to get inside? Because some part of him knows what he'll find in there? And then, maybe, what that might lead to.

He gets a small grip on himself, just enough to add, "I think I might know what's going on. You touched a strange plant, yes?"