"Two friends are in an urban setting, one of them with a fake smile while hiding

"Two friends are in an urban setting, one of them with a fake smile while hiding a knife behind his back. The other friend smiles genuinely, without realizing the impending betrayal. The background of the image is dark, with shadows and dark colors, creating an atmosphere of distrust and falsehood. Facial expressions should convey the difference between sincerity and falsehood.."