Instinct.

Wong Tin (Adam Cheng) is a wealthy businessman in Hong Kong. Although he is honest and righteous, he is framed by a business rival. Pau Man-lung (Ekin Cheng) is a ICAC agent tasked with investigating the case. Mutual respect soon develops among Wong Tin and Man-lung. After Man-lung loses his job, he start to work under Wong Tin with his best friend Poon Long-ching (Roger Kwok). Although Wong Tin is a successful businessman, his personal life is not in good shape. He is divorced and his eldest daughter Wong Lui (Amy Kwok) resents him. Wong Lui develop feelings for Man-lung after her mother died in a car crash. However, Man-lung had already fallen in love with Lam Ching-lit (Adia Chan).