The children are to walk through a haunted graveyard at night, to a room in the grade school where a skeleton is expected to scare the children away. Incidentally, the last day of the camp happens to be April 4th. Ken, one of the boys who are preparing for the setup, climbs up the clock tower of the school as if attracted by some invisible force. The next moment, a dark cloud swallows the school house, locking up some children from Tokyo in the schoolhouse as well as some village children. Kazunari, a burglar who happens to be there falls victim too.
Bizarre ghosts appear one after another attacking the children.
They run about seeking refuge, to no avail. It is only after some futile efforts when they realise the incident Ken stopped the clock caused all this trouble. They fixed the gear so the clock works again, and they are released from the world of ghosts. Through the mysterious accident, the children have learned the importance of helping each other, and they make friends.