In the 1850s Irish countryside, amidst religious fervor and fervent gossip, Nurse Lib Wright, a disciple of Florence Nightingale, arrives to observe a supposed miracle: young Anna O'Donnell's survival for months without food. As Lib's watch over Anna extends, she confronts a community wrapped in enigma and a child's life hanging in the balance. With each passing day, Lib's skepticism clashes with the villagers' blind faith, and her quest for truth leads her down a path of unearthing harrowing secrets and moral dichotomies. Serving both as a vivid period piece and a gripping psychological thriller, 'The Wonder' unfolds a tale of science versus belief, the role of the outsider, and the lengths one will go for truth and compassion.