Jon Martello objectifies everything in his life: his apartment, his car, his family, his church, and, of course, women. His buddies even call him Don Jon because of his ability to pull ``10s`` every weekend without fail. Yet even the finest flings don’t compare to the transcendent bliss he achieves alone in front of the computer watching pornography. Dissatisfied, he embarks on a journey to find a more gratifying sex life, but ends up learning larger lessons of life and love through relationships with two very different women.