When Michelle Yeung becomes the obly witness in a murder committed by a powerful businessman, she knows that her life is in extreme danger. Thanks to her wealthy boyfriend who is also a entrepreneur and has close relationship with Chinese government, a crack bodyguard named Hui Ching-yeung is sent to be Michelle's bodyguard. Troubles arise as the stoic, strict and commanding bodyguard and the spoiled, free-spirited witness must confront their deep feelings for one another.