Accompanied by a lullaby, all life in the world fell into a dream from which they could never wake up, and the entire earth became silent. A hundred years later, a young man woke up from his dream for unknown reasons, only to find that the earth had been ruled by a creature called a dream monster, and he unexpectedly gained the power to enter their dreams. Faced with family and friends trapped in an eternal dream and a mysterious species that has never been seen before - the dream monster, can the boy wake up everyone alone?
