In a grey and indifferent future world, a time machine is hidden in the basement of an antique shop. The shopkeeper travels through time and space to find the abandoned robot from her past, and installs the mysterious sapphire into the robot’s body, giving it inexhaustible energy. This dilapidated and immortal robot experiences human life in the grey future world, meeting good people and bad people, and encounters failure on his lonely dream journey. Finally, he overcomes all kinds of fears, regains self-confidence, and determines to leave the indifferent world and return to an era full of human warmth.