Zhao Nian has been married to her programmer husband Zhou Chuan for six years and receives a red envelope of 8,888 yuan every New Year's Eve. She accidentally discovered that this string of numbers contained encrypted coordinates, pointing to an abandoned border missile base. She took the evidence to the National Security Bureau and found out that her husband was an undercover agent who had been hiding for ten years. Relying on her understanding of her husband, she uncovered the mole and assisted in the rescue. In the end, Zhou Chuan returned safely. The two stayed away from disputes and stayed together in ordinary fireworks, protecting their country and each other.
