In ancient times, there were two civilizations in the universe, representing light and darkness respectively. Just as light and shadow are always contradictory, the two civilizations have been at war for many years. In order to win, the civilization representing darkness created a high-tech warship. This warship has super combat capabilities and the ability to travel through time and space, and it also has its own thoughts. However, this warship will use the driver as its food to enhance its own strength. This black warship is like a devil, which will completely destroy the enemy, but at the same time it will also devour the life of the driver. At the same time, in order to fight against the enemy's black warship, the civilization representing light also created a white warship to compete with the black warship. Later, both civilizations disappeared for unknown reasons, but those warships still exist in a corner of the universe. People in the new era gave them a name - Lost Ships. The world where the story takes place is set as the "other world" in Slayers. The story focuses on the "Lost Ship - Feitian No. 1". And the devil who rules this world is the alien devil who was destroyed in the Dark Star. Due to the development of "psychophysics" that converts mental power into energy, a far future with technology that exceeds the speed of light has been created. The protagonist Kane solves various accidents in this world. This job is called "TROUBLE CONTRACTOR" (TC for short). Kane's partner is Canal, who appears to be a human, but is actually a three-dimensional projection of the main computer of the Hiten No. 1. She has a terrible personality, and Kane was thrown out of the spaceship (in the universe... life) as revenge for making her angry. Another partner is Mill, who wants to be the "number one in the universe". Mill was originally a detective, but was fired because of Kane and became a TC. Mill's shooting and cooking skills are very good...but when she cooks, the kitchen suffers...