Nicolo Rosetti is the son of Paolo and Marian Rosetti, as well as the half-brother of Francesca Rosetti. Marian brought Paolo, Francesca and Nicolo to Beckindale in June 1987 to meet her father Henry Wilks. During their time there, Paolo accidentally shot himself whilst going after Eric Pollard, and Francesca discovered him. However, Paolo recovered and the Rosettis returned to Italy in July 1987.
On New Years Day 1991, Paolo was shot dead by an unknown assailant, and the police believed Marian was the assailant. Prior to his death, Paolo had discovered that Marian had an affair with his friend, and threatened to divorce her and go for full custody of Nicolo.