Legend has it that the forest that makes noise in the morning is the home of monsters. When the demented old woman (played by Wang Yan) and the monsters were distressed about the forgotten way home, the old woman met university classmate Wang Xin (played by Xie Qiongnuan). She accidentally opened up the inextricable past, but also quietly unravels the mystery of the monsters' origins, and clues emerge as to the mysterious location of the forest.