You are in a long-term relationship. You feel loved, safe and happy. But what would happen if you'd suddenly be transported back in time to 12 years ago, before it all started? Would you still feel the same? Would you jump to rekindle the relationship? Would you feel sure to say nothing will change between the two of you? Would your partner say the same? "What Happens To The Heart" explores the fantasy scenario in which a happy couple in their thirties explore whether their relationship can survive a crazy twist of fate - being transported 12 years in the past, before they knew each other, with their memories intact.