Keepers of Memory: Urban Hypothermia

Zhang Jun's biggest wish in this life is to protect his amnesia-stricken grandmother and live a peaceful life in a small town. But when he found a silver ring in his grandfather's old toolbox, all his peace was shattered. The ring gets hot, emits images from more than twenty years ago when touched, and attracts things that are invisible but real. Grandma is forgetting day by day. The cause of grandpa's death has always been a mystery. There seems to be a truth buried in the abandoned Red Star Fertilizer Factory in the town that some people are trying desperately to cover up. Zhang Jun originally thought that he was just helping his grandma retrieve her lost memory. Until he discovered that the ring he held in his hand was itself a sealed past - and some people desperately wanted to destroy that past, while others desperately wanted to keep it.