Nicky Larson (Han Yu Liang) is a private detective known as "City Hunter". He is humorous, just, appreciates the nature of beautiful women, is good at dealing with a wide variety of difficult tasks, and is deeply trusted by clients. Ah Xiang and Han Yu Liang have been partners for many years. They seem to love and kill each other, but they actually care about each other. One day, A Xiang received a mysterious business for the two of them-protecting a bottle of perfume that will greatly increase their charm no matter who uses it. Han Yu Liang and A Xiang are about to start a new adventure, what kind of plot is intertwined behind all this, and how many people are involved in this ironic war.