Midnight Girl is a casual 2D point-and-click adventure game set in the vibrant backdrop of Paris inPlayers follow the story of Monique, a late teen tomboy who thrives as a cat burglar. After a heist goes awry, she finds herself in jail, where she encounters a mysterious fellow thief who reveals the existence of a precious diamond hidden in a secret underground vault. This intriguing premise sets the stage for a thrilling adventure.

As players navigate through various locations such as a Catholic monastery, a bustling Parisian metro station, and the haunting Catacombs, they engage in puzzles and exploration to aid Monique and her companion in their quest. The game draws inspiration from Belgian comics and Sixties heist films, immersing players in a nostalgic atmosphere filled with charm and suspense.