Detective Jixian (played by Im Changding) has recently encountered a lot of trouble. Because he helped his friend to guarantee the debt, he got into trouble and became a customer with bad credit. Jin Wuling (played by Yan Zhiyuan), a salesperson of a debt company, is a "deadly" female operator with a persistent spirit in business. Her unique skill is to call the debtor every 30 minutes, day and night. Whenever Fang Jixian performs important tasks and hunts down important suspects, Fang Jixian always receives debt collection calls from Jin Wuling, and all previous efforts are wasted. However, by mistake, Fang Jixian helped Jin Wuling find the lost wallet. His sincerity touched Jin Wuling's heart, and Jin Wuling also believed that she had met her true love. This pair of happy enemies who should have tied the knot did not know that each other was the most hated person by the other.