The 2004-05 campaign delivered a surreal and dramatic promotion for Treviso as the Biancocelesti, despite finishing a respectable 4th in Serie B, clinched a historic first-ever place in Serie A. Leading the charge was the young Brazilian forward Paulo Vitor Barreto, whose 12 goals proved vital in a fiercely competitive season. The team, under Giuseppe Pillon, were ultimately awarded the promotion due to the subsequent financial and legal troubles of other clubs, turning a play-off defeat into a triumphant, unforgettable chapter in the club's history.. The 2005-06 campaign was an unforgettable, albeit painful, season for Treviso as the Biancocelesti finally reached Serie A for the first time in their 96-year history, only to finish 19th and be relegated back to Serie B. This debut season in the top flight, achieved controversially due to the demotion of other clubs, was built on hard work and grit but ended with only three wins. Leading the line were the joint-top scorers Marco Borriello and Reginaldo, who each notched 5 goals in the league. It remains a historic but ultimately heartbreaking chapter for the club, compounded by an initial, brief reprieve from relegation following the Calciopoli scandal that was later tragically overturned.