Four couples embark on an emotional experience in an effort to save their real marriages. They say goodbye to the lives they know and switch spouses with a complete stranger, taking part in an experimental marriage for two weeks.

The experimental couples are assigned activities to help them explore each other’s passions and personalities. Some couples are forced out of their comfort zones, while others become too comfortable. Tensions rise when the experts drop by with a surprising announcement.

Emotions run high as the couples cope with seeing footage of their real spouses with their experimental partners; the experimental couples are tasked to become more vulnerable with one another, but not everyone is ready to open up.

With the switch almost halfway over, the experimental couples participate in an exercise to help build emotional intimacy, with some continuing to open up and others beginning to shut down; the experts check in and deliver a surprising announcement.

The experimental couples confront their biggest challenge yet, as they come face-to-face with their experimental spouses' real spouse; not everyone likes what they learn, and feelings of jealousy and regret begin to surface for some.

As switch therapy begins to wind down, the experimental couples learn how to rely on a spouse in order to navigate the unexpected; the couples get a new perspective on their time in the switch at intense group summits.

The experimental couples reflect on their time together. As the couples prepare to say goodbye, letting go of their “new life” proves difficult for some.

Back home, the couples are reunited with their real spouses, where new revelations are brought to the forefront. Some use the lessons they’ve learned to try and save their marriages, but others begin to fall back into old habits.

The couples reunite and must choose between parting ways or recommitting to their marriages.