影片讲述了凤凰城UFO事件之后，奇怪的事情开始接连发生，三名青少年乔希、艾希莉、马克在用DV记录这一切的过程中突然离奇失踪，至今下落不明。在他们失踪二十周年之际，乔希的妹妹苏菲为了寻找真相，决定和男朋友杰伊展开调查，随着当年拍摄的内容不断被披露，隐藏在背后的真相也将浮出水面。

Instead of chasing boys on the beach with her friends, recent college grad Dora finds herself caring for her reclusive Great Aunt in snowy upstate New York. When the imaginative girl discovers her aunt's hidden romantic past, Dora dreams that their revelation will pull Aunt Vera and herself from their mutual depressions.