At first glance Emma and Charlie are the perfect couple, newly engaged and with the full support of their wealthy families they're on track to have the wedding (and marriage) of their dreams.

But as the wedding grows closer, they go out for dinner with some newly married friends (played by Mamoudou Athie and Alana Haim) who prompt them to discuss the worst thing they've ever done before they tie the knot. Unfortunately, their 'worst things' aren't equal and the aftermath threatens to ruin both their relationship and potentially each other.