3 ideas
In 1980s rural Ireland, a young unnamed girl from an overcrowded, poor family with a new baby on the way is left by her father with John and Edna Kinsella, childless relatives, and he drives off without leaving her suitcase. When she is returned home she runs back down the lane after Kinsella's car and throws herself into his arms, calling out 'Daddy' as her own father approaches with a stick.
A child who has only known being one of too many learns she is valued through small, consistent acts of attention rather than declarations: a bath, clean clothes, a meal served with patience, an adult who explains instead of scolds. These routines teach worth because they show she is noticed, which a scarcity household cannot provide even when it holds no malice.
The Kinsellas' unusual care for the girl is partly grief looking for somewhere to go: dressing her in the dead boy's clothes and keeping up his room lets their love continue in a new form. Seen this way, their warmth is real and also mixed with mourning, so one child's rescue is braided with another child's absence.