The protagonist Mo Li is a legendary doctor with unparalleled skills. He has a secret: in fact, he’s actually a fish sprite that has attained human form. Wishing to find similar companions, he has travelled all over the world in search for them — but, besides him, other fairy folk simply do not exist! Though he did not manage to find any comrades, however he often got unjustly implicated in the troublesome affairs of others.
