单亲妈妈 Alice 在生出 Marco 的那一刻，他的笑容就杀死了医生，后续一系列的事件发生，致使视子如命的 她带着 Marco 亡命天涯，终于找到 Marco 可以安身的世界，而复仇者突然出现，至此母子命运发生了彻底 的改变。
        The smile of a baby is the sweetest thing in the world. But what if the smile can kill others? What if you are the mother of that baby? Alice, an urban single-mother sacrifices everything to protect her baby boy Marco, who is born with a deadly smile that would kill anyone he smiles at, except herself. After the secret of Marco is revealed after a series of killing, the mother and the son are on the run.