Alliances are tested when seven college pals reunite to watch two of their own say 'I do' at a seaside wedding. But the maid of honor and the groom share a passionate history, and the bride isn't the only one who's wondering if it's all in the past, proving that nothing complicates friendship like love.

Michael and Jenna have been a couple for three years. At dinner one night, Jenna's parents, Anna and Stephen, announce that they are having a baby. Jenna is overjoyed, but everyone else has mixed emotions. At a wedding the next day, Jenna and Michael meet up with friends Chris, who is tired of his wife telling him how bad he is as she deals with their whiny baby; Izzy who is taking the break-up of his most current relationship badly and does not react...

To the amusement of their adult children and friends, long divorced couple Don and Ellie Griffin are once again forced to play the happy couple for the sake of their adopted son's wedding after his ultra conservative biological mother unexpectedly decides to fly halfway across the world to attend. With all of the wedding guests looking on, the Griffins are hilariously forced to confront their past, present and future, and hopefully avoid killing each...