The story revolves around the Wui Yau Safeguard Agency (會友鏢局), which is the most prominent safeguard and escort agency in Hangzhou. However, the agency was discovered to be close to bankruptcy, due to financial mismanagement. Together with his four sons, the patriarch of the family, Sheung Ching-Tong (Samuel Kwok) must, along with other allies and confidantes, rebuild the agency and save it from near certain death.
The series starts off with Sheung Chi having to go to the help of his elder brother - Sheung Chung and their tumultuous relationship. This relationship was severely strained when Sheung Ching Tong had to decide on who will succeed him as the master of the agency.