Watch The Key (1983) HD Full Movie Free on SolarMovie. Watch The Key (1983) online free. 1940s Venice. After twenty years of marriage, a retired art critic and his younger wife feel their p...1940s Venice. After twenty years of marriage, a retired art critic and his younger wife feel their passion is waning. To help her shed her inhibitions and rekindle their relationship, the professor records his sexual fantasies in a diary.