When David Lovatt meets Harriet at an office party, they both immediately fall in love. They both share the same conservative outlooks, which they perceive to be a rarity in the London of the 1960s.
The two marry and purchase a large house in a small town within commuting distance of London. The couple both intend to have several children, a wish frowned upon by the rest of the family. By the time they have four children, two boys and two girls, their house becomes a centre of joy not only for them but for all their relatives and friends who come and visit. This continues until Harriet has a fifth, wildly dysfunctional child, Ben. Her painful pregnancy with him marks the beginning of the misery and suffering that this child brings to the whole family.