After flirting auspiciously at a wedding, David (Farrell) and Sarah (Robbie), meet at a motorway restaurant before driving off together guided by David’s chatty GPS (fellow Yang veteran Jodie Turner-Smith). They stop at a series of doors in the countryside which teleport them to places and moments that have helped define their lives. They visit the hospital where Sarah’s mother died of cancer, though at the time it really happened she was 19 and selfishly absent, having an affair with her college professor. David also has his share of unlikeable qualities, especially when depicted breaking up with his former fiancée. Such relationship inadequacies help explain why both are perpetually single – even if such a fine-looking pair being alone is less credulous than the duo using magic doors to time-travel into the bodies of their younger selves.