The protagonist who suffers from lovelorn is a researcher in the archives and has been engaged in the investigation and interviews of war survivors. The tragic experiences of those survivors made him miserable. One day, while digging a corpse pit left by the Japanese invaders, he accidentally discovered a skeleton holding a violin, so he decided to find out the secrets hidden in the skeleton. Then, based on the jade pendant necklace hanging around the neck of the remains and a small amount of information collected by his colleagues, he made a desperate dash to Hokkaido, Japan, in the middle of winter, to find the owner of the necklace, hoping to restore that period of history. In this way, after some twists and turns, the protagonist finally found the relevant party and learned about a love story across borders from the owner of the necklace. During this visit, the protagonist also gained his own love.