Ethan Frost, the heir of the Celestial Healers, comes down from the mountain on his master's orders to fulfill his marriage pact with Claire Lynn. Working undercover as a security guard to protect the Lynn family, he uses his supreme medical skills to crush crises and punish villains. Pretending to be a weakling while hiding his true power, Ethan uncovers that the Duke family slaughtered his own people. Ultimately, he slays his enemies, shields his lovers, and reigns supreme over Harbor City.