Keiichi Maebara has just moved to the quiet little village of Hinamizawa in the winter of 2006 and quickly becomes inseparable friends with schoolmates Rena Ryuguu, Mion Sonozaki, Satoko Houjou, and Rika Furude. One of Keiichi's classmate start to act strange and ask him all sort of weird question. While trying to help her, he unearth the darkness that lurks over seemingly idyllic life they lead.