The Hell and Heaven Cultivation Trials

When a mother is taken by a demon to the underworld and you don't know what for and you think she's dead, A heartbroken father under stress of having to take care of twins and he knows he can't leave them, and he can't go into the underworld for help because of his betrayal to the demon king. This is a story of the opposite twins journey into heaven and hell this is the Hell And Heaven Cultivation trials.