Now that all five couples have been Married at First Sight, it's time for them to spend their first night together as husband and wife. Before setting off for the honeymoons, the couples have to meet individually with their new in-laws--can they survive a brunch interrogation?

As the couples enjoy the last few days of their action-packed honeymoon in Mexico, they discover more similarities and differences that will affect their marriages. Meanwhile, one of the couples must navigate their first major fight.