Four ordinary Australian couples embark on a confronting and challenging eight week journey to happiness and relationship fulfilment. For some, it's their last chance before possible separation.

The couples focus on repairing toxic communication styles & learn non-verbal communication is as important as what is said. But change is hard, & for Dom & Carla, memories of their honeymoon fuel a major dispute.

As the experiment ends, an apology from Alison could make or break her relationship with Paul. Inhibitions are lowered during a kissing contest in a crowded mall, and the surprising final scores are revealed.