Nicky and Anna, brother and sister, reunite in their childhood home in the Venetian countryside. Accompanied by Anna's lover, Claudia, and Nicky's partner, Picchio, they plan to spend a Sunday together when fate intervenes.
| Actor | Role |
|---|---|
 Mariangela MelatoAnna | Anna |
 Eleonora GiorgiClaudia | Claudia |
 Erland JosephsonNicky | Nicky |
 Nerina MontagnaniCaterina | Caterina |
 David PontremoliPicchio | Picchio |
 Armando BranciaOwner of restaurant | Owner of restaurant |
| HHella PetriMarta | Marta |
 Fred PersonneRossino | Rossino |
 Anne CaudryYoung bride | Young bride |
 Peter BoomCaterina's grandson | Caterina's grandson |
 Siria BettiRossino's wife | Rossino's wife |
 Amedeo SalamonPriest (uncredited) | Priest (uncredited) |
 Massimo PittarelloGiocatore (uncredited) | Giocatore (uncredited) |