Snake is a healer in a post-apocalyptic nuclear world. She travels wherever her abilities are required as a member of a select group committed to helping the sick.

Along with her, she carries three lethal reptiles that help her cure patients: a cobra, a rattlesnake, and the dreamsnake, a snake whose hallucinogenic venom eases the dying rather than heals them.

This dreamsnake is precious and uncommon. Following the senseless death of Grass, Snake must travel through dangerous terrain in search of a substitute.

I got to read it from shabd.in