Qin Feng and Wu Ren have known each other for many years online, but they have never met. In the summer of 2015, the two agreed to meet in Yantai Mountain. Qin Feng rushed to Shandong alone, but Wu Ren disappeared mysteriously. In the next few years, Qin Feng went all the way south, looking for the tide and asking the waves, and his heart of Wu Ren was immortal. In the summer of 2019, Qin Feng landed on Hainan Island and traveled to Boao Town. He accidentally found a seaside cafe called "Old House". Every afternoon, old movies were shown. Qin Feng was shocked that these videos seemed to be related to Wu Ren...