When the 22-years-old woman Shirley decides to join the Occult Research Agency to find out more about the troubled past of her city, she's in for a big surprise. She will have to uncover the mysteries of Union City, helped by her friends Yu, Masha and Aya. But the situation keeps getting more and more intricate, and as they struggle against the dangerous and unpredictable shadow creatures, a lurking entity is starting to rise...
4 parts