Amber Vickers is thrilled to finally be marrying her dream partner, Luke, after a series of unsuccessful relationships that left her doubting herself. Her future mother-in-law and close friend, Jill, sees Amber as the ideal daughter she never had. Everything seems perfect until Amber’s mother, Sharon, arrives for a visit. Sharon is flashy, rigid, and outspoken, starkly contrasting with Jill. What was meant to be a simple introduction between the in-laws quickly escalates into a rivalry, as Sharon and Jill hold vastly different opinions on life, love, and marriage. As the weekend draws to a close, Sharon takes drastic action to ensure Jill is unable to leave her home, determined to show that no one will come between her and her daughter.