Penny has big dreams for her wedding day. She wants an unforgettable celebration, and has been saving for ages to make her dream a reality. But when Penny checks her wedding fund, she's horrified to discover that something has gone very wrong. There's far less money there than she'd thought - and it's all her fault. She can't tell Mark the truth about how much time she spends gambling online, so she seeks help for her addiction and redesigns her wedding on a smaller budget. Working under the pretense of surprising Mark with her plans, operation 'Don't Tell the Groom' rolls into action.