Ashes in the Snow (Amazon Prime) is a little movie, but “little” doesn’t mean small. Ashes focuses on the personal trials of an adolescent girl, Lina Vilkas (Bel Powley), amid the shattering events of World War II. The film opens in Kaunas, Lithuania, 1941, with Lina, a self-taught artist who dreams of art school but worries that she lacks the talent. Her father, Kostas (Sam Hazeldine), gently encourages Lina, even as her mother, Elena (Lisa Loven Kongsli), objects that he may be building up Lina’s hopes for something she can never have. The situation is familiar in every sense of the word and, therefore, “little”.