A tale about the dust-dwarf Celestín and his friends, with whom he journeys through a mysterious basement for seven days. One morning, Celestín finds out that his mother, father and the rest of his relatives abandoned him. For a while, he is sad, but then he decides to go look for them and to bring his friends Moth and Spider on the search. During their seven-day journey through the mysterious basement, they experience exciting, funny, but also mortally dangerous adventures. There are numerous fights and one wedding. Celestín visits the barbarian world of the Saucers, the terrible Country of Sadnesses, the beautiful Crystal principality, the fun flea circus and also a terrifying black castle.