Iona Anderson is a stubborn, hot-headed delinquent from a rich family of total perfectionists, which includes her parents and her two sisters, Diane and Carrie. When she gets the news of Diane's marriage to her long-term boyfriend, Sean Hunter, Iona is called to come home and attend her sister's wedding. She is annoyed. Iona hates weddings, especially after the incident that occurred at her cousin's wedding. Iona arrives at her home just a few days before the wedding, and she meets the Hunter family, which includes Sean's parents, younger brother Patrick, who is about her age, and little sister, Hayley. Iona crosses her fingers and hopes to make it alive and unembarrassed through her sister's wedding, though little does she know that the drama has just begun.