The global extreme heat apocalypse is coming, with temperatures soaring above 70 degrees, and human civilization is on the verge of collapse. Zhang Yang, an ordinary college student, awakens as a judge of the underworld on the verge of death and discovers that the source of the extreme heat is the outburst of resentment by the ancient god of fire, Zhu Rong. In the chaos, Erlang's soul fell to the underworld. Zhang Yang used the sovereignty of the underworld to conquer Erlang and form an alliance of gods and ghosts. He used Erlang Shen's heavenly eyes to see the source of heat, relied on the power of reincarnation in the underworld to collect soul power, and led the underworld ghosts and Erlang Shen to seal the extreme heat step by step, while fighting against the human forces who took the opportunity to cause trouble. In the end, Zhang Yang unified the three realms, reshaped the world order, and became the savior of mankind.
