Shu Qian, a famous detective in City A, has no case that cannot be solved in her hands.
Yuchenzi, a colleague sent by his superiors to assist in the investigation, is called the "Rain God" by others.
When they met for the first time, Yuchenzi was mistaken for a robber and chased him through most of City A.
From then on, she never escaped from his grasp.