Medicine Valley's Master Shattock goes undercover as a security guard in the city to search for his five long-lost sisters. Learning they are each in crisis, he reveals his true self, using supreme medical skills and martial arts to overcome all threats—from resolving business troubles to curing rare diseases and reclaiming family legacies. Through these battles, he uncovers his identity as the sole survivor of a great family, ultimately confronting those who destroyed it, avenging his past, and reuniting with his sisters for a peaceful life.