Two sisters living separate lives on different continents are reunited on a Mediterranean Island. The two barely have time to bond and revive family ties as Kate, the elder, meets a group of locals and agrees to an exciting ride on a hot air balloon. But disaster strikes and as the result of a freak accident, the balloon is carried far out to sea. Their cell phones out of range, and the balloon running out of gas, Kate and her friends are battling for their lives. While, back on land, the younger sister, Liz, has become an unwanted "material witness" to a crime. Matters then take a dramatic twist, one that will mark their lives forever.

一位苦苦挣扎的小说家将他的妻子和年幼的儿子搬到了一个古老的乡间住宅，他打算在那里写下他的下一本畅销书，但当一个存在开始与他的儿子交流时，这个饱受折磨的家庭必须努力摆脱一个威胁他们注定要落入地狱的邪恶。 永远的房子。