Sussex, England, 1938. Shortly before the outbreak of World War II, Thomasina and Martha Hanbury, two ingenious sisters, create LOLA, a miraculous machine.

Klara, an Artificial Friend designed to prevent loneliness, is purchased by a mother and her bright teen daughter, Josie. Josie, who suffers from a mysterious illness, adores her new robot companion. On a quest to save Josie and those who love her from heartbreak, Klara learns the power of human love.