Li Yuanbo is the only male heir of one of the four great families of the capital, and the younger brother of seven older sisters. Sent abroad to study, he unexpectedly becomes embroiled in conflicts between underground factions. After returning home, he faces the weighty responsibilities of his family and the temptations of the underworld, ultimately choosing an unconventional path. Drawing on the advanced knowledge and strategies he learned overseas, he rises rapidly, unites the Chinese underworld, and becomes a ruler of his generation. At the peak of his power, Li Yuanbo not only protects his family's interests but also seeks out the light in the shadows, working with the government to safeguard social stability and security.