提托是个害羞的十岁男孩，和母亲住在一起。突然间，一种闻所未闻的流行病开始蔓延——人们只要感到恐惧，就会生病。疫情蔓延全城，社会陷入恐慌之中，传染病愈发肆虐。提托很快发现这种病的治疗方法与他失踪的父亲对鸟叫声的研究有关。他和朋友们——坚强无畏的莎拉、朴实而谦逊的布伊、傲慢却乐于助人的富家子弟提奥以及他的跟班——开始了一段拯救世界的旅程。提托对于解药的研究过程也是寻找失踪的父亲和个人身份的过程，而提托与朋友、家人及对手之间的关系也是影片中的吸睛之处。
The film opens in a bleak police station where celebrated war correspondent Kate Rafter (Seagrove) faces questions from a psychiatrist, Dr Shaw (Kurylenko), as they work through the painful events of Rafter’s life. A horrific incident in war-torn Iraq and the death of her mother (Steed) have brought a haunted Rafter home to Herne Bay, a place she believed she had escaped forever. Her resentful sister (Friel) has not made her sister welcome and her forbearing husband Paul (Miles) fails to broker peace. Whilst packing up her mother’s belongings from her childhood home, Rafter comes to believe there is something strange and terrifying happening in the house next door.
