Lampje lives with her father Augustus in the lighthouse. Every evening she climbs up to light the big lamp. But one time, when there's a storm, the matches run out. The lamp stays out and in the dark night a large ship crashes against the rocks. Augustus is blamed and imprisoned for punishment. Light has to go to work in the Black House on the cliff, and everyone knows that a monster lives there. Martha, the housekeeper, forbids Lampie to go upstairs. But Lampje misses her father and the sea, and she can only see the lighthouse from the tower room. On tiptoe she sneaks up the stairs...