At an airport in the Midlands, Suburban parents Ken (Greg Davies) and Lorna (Helen Baxendale re emerging from the woodwork) eagerly await the return of their only daughter, Rachel from her gap year. Rachel however, has brought back an unexpected souvenir and surprises her doting parents by introducing her new husband, Cuckoo. A travelling hippie and every parent’s worst nightmare, Cuckoo considers himself a spiritual teacher and visionary who, much to Ken’s indignation, vows he would never take payment for his services and therefore has no income to support his new wife. He's also a bit, well, Cuckoo.