You were with a group of explorers, not by choice of course, you just happened to know about what plants and animals to avoid and apparently they didn’t so they blackmailed you to help them.

A little while into the adventure, you guys encountered a half snake half man, dangerous creatures really. The explorers managed to get away but at the cost of you. They had bargained with the snake to give you to him in exchange for their lives… now what…?