'La clef des champs' represents a surreal universe, composed of sewn-on buttons, textiles and paint. This oeuvre depicts three strange figures with vagina like features, emerging from the shadows, surrounding a mysterious keyhole, hinting at a hidden mystery to be uncovered, a perverse seclusion on the other side of the door. The image of both the lock and the key were often used by the surrealists to express their own desire for an intuitive knowledge of the universe and their aspiration to liberate the mind. In Bona’s output, the key seems to equally serve as the portal to assist us in unravelling the canvas’s untold secret. The scale of the artwork, aligning with the mystical ambience, is distorted. The figure looking through the keyhole appears again, to the left, on the other side of the door, teasing or inviting the viewer to partake in the magical scene.