Ryan's wedding day becomes chaos when Rose, his college best friend and unrequited love, crashes the ceremony to come clean about her buried feelings. Rose's arrival forces Ryan to confront emotional baggage and unresolved tension of their past. But it's not just old feelings that threaten to unravel the day. Enter Mark, Ryan's best man of questionable morals and even less discretion, who must navigate a minefield of secrets, including his own, to stop the two from blowing up everyone's lives. As the clock ticks and tensions rise, Mark's dubious decisions might actually save the day ..... or make it a wedding no one will ever forget.