contains of 3 mebers with their own characteristics and role in the team.
some people might complain about main cast character development. but honestly their character development is actually the best so far than any msystic problem solving korean dramas i ever watched.

its not about how you solve the current problems. but its about how those you helped will proceed in their life/afterlife after it.
the concept is like "only you that can save yourself, what we give is just a single little push and some extra hands if you ever need it". love it