Twinless is a classic comedy, in that no matter how much you laugh, you can never shake the feeling that the essence of the situation is tragic.
Roman is grieving the death of his identical twin brother Rocky in a traffic accident. He finds solace in a new friend, Dennis, whom he meets at a support group for people whose twin has died. Dennis provides the missing half Roman grieves for, and accompanies him as he shops for groceries, folds laundry and goes to hockey games.
Roman is stereotypically straight, and is also drawn to Dennis because, like Rocky, Dennis is gay. Dennis is talkative where Roman is taciturn, worldly where Roman is naive, and seems to have been able to move on while Roman remains grief-stricken. But Dennis harbours a shameful secret that threatens not only his friendship with Roman, but his own safety.