Teenager Will Burrows searches for his father who has disappeared in an mysterious tunnel and stumbles upon a potentially deadly secret. Based on Roderick Gordon and Brian Williams' adventure books "Tunnels".

塞西莉亚（西德妮·斯威尼 饰）是一个非常虔诚的修女，她来到意大利乡间修道院开始新生活，却在这个几乎全是女人的地方意外怀孕，原来这里隐藏着黑暗和可怕的秘密。