Zhao Buzheng, as his name suggests, is a poor-tongued, stingy programmer who is always soft-hearted at critical moments. An outrageous job search led him to join the mysterious Intelligence Company; a rescue in a reservoir brought a girl named Pingfan home. From bickering and living together to searching for weird voiceprints side by side, the two gradually got closer, and also revealed old numbers, childhood promises and a long-overdue "Why didn't you look back?" When artificial intelligence began to search for answers to his memory, Zhao Buzheng discovered that everything he thought happened by chance was already closely connected with the girl he missed.
