Elie de Monbert's consciousness floats in nothingness. He felt like he was immersed in some kind of cold liquid, and the continuous mechanical buzzing in his ears and the echo of dripping liquid intertwined into a strange symphony. The mixed smell of disinfectant and metal irritated his nasal passages and made his throat spasm involuntarily. This smell reminded him of the antique clocks in his father's study when he was a child, and the smell of engine oil emitted by those precision gears. The background of the game Operation Delta! Inspired by a scene from the Delta entrance animation, also known as the cover! The road of revenge that transforms people! The love history of a scientist! !