The sailor Pietro and his rat companion Roscuro dock in the kingdom of Dor, famous around the world for its delicious soups, during the "Royal Soup Day." The chief cook, Chef Andre, makes good soup due to Boldo, a magical genie that emerges from his pot and is made entirely out of food. On a banquet, when Roscuro slips away and ends up in the royal banquet hall, he slips and falls into the Queen's soup, giving her such a fright that she has a heart attack and dies. The entire hall goes into a panic, as the guards pursue Roscuro. He attempts to flee the castle but sees Pietro's ship has already sailed away. He narrowly escapes capture by falling down a sewer drain, which leads to the castle dungeons, where he's found and taken in by Botticelli, the leader of the dungeon's large rat population. Distraught over his wife's death, the king forbids any and all things related to soup and makes rats illegal. Without its soup, Dor becomes impoverished and dreary. Andre is banned from making any more soup and Boldo stops appearing. The king's daughter, Princess Pea, despairs over the sad state of the kingdom and how her father has shut out both her and the world in his grief.