Ally and Jonathan have been married for ten years. They share a close relationship with Jonathan's cousin Tim, whom Ally dated when they were both teenagers. Tim, now a grieving widower, is present when they receive the news that Jonathan has a highly malignant inoperable brain tumor. While they minister to Jonathan, Ally and Tim recognize that there is chemistry - still - between them. Unable to help themselves, they act on their carnal attraction. Just as guilt consumes them, Jonathan enters the mix, presenting Tim with an unorthodox proposition....