An idyllic town bathed in the summer sun descends into madness when a mysterious ice cream seller begins treating children to sweet treats with gruesome consequences. Innocent smiles quickly give way to brutal fury as the children turn into merciless hunters of the adults. Three young heroes, who miraculously manage to avoid the curse, embark on a desperate race against time to discover the terrifying truth behind the ominous melody and stop the nightmare before it consumes the entire town... along with them.