The title of Charlotte Wells’s film invokes a balm used to soothe skin scorched by an unforgiving sun. Again and again in Aftersun, the characters partake in the restorative rituals of this salve; in recurring close-ups, Calum, a young, separated father, and Sophie, his 11-year-old daughter, rub lotions into each other’s limbs and pale-pink faces as they holiday in a bright, garish resort ...