While absence makes one groom's heart grow especially fonder, time apart reveals troubling fault lines in other marriages, testing one couple's relationship to the brink of destruction.

Homestays get underway, giving the couples a glimpse of what life could be like outside of the experiment, and the opportunity to gain insight from loved ones. While there are warm welcomes for some, one couple's marriage is jeopardised by a meeting with some straight-talking friends. Also, a scandalous secret is revealed, threatening to blow another marriage apart.