一场车祸，六名幸存者，无法逃离的神秘河谷，错综复杂的命运羁绊，那些掩埋在心底的秘密，即将唤醒！　　一场车祸让几名幸存者受困神秘河谷，求生路上他们陷入某种超自然现象的困局之中。该剧由吕聿来，刘畅，陈小纭，陈昊宇、赵阳、张植绿、王梓尘等一众实力派演员领衔主演。

FoxhasgivenaSeason3pickuptoAlert:MissingPersonsUnit.Therenewaloftheproceduraldrama,starringScottCaanandDaniaRamirez,hasbeenexpected.　　Tomakefilmingmorecost-efficientforseriesproducersSonyPicturesTelevisionandFoxEntertainment,Alertwillremainincontinuousproduction,segueingfromtheabbreviated-by-the-strikessecondseasontoSeason3,whoseepisodecountisstillTBD,Ihear.ThereisanadditionalbenefittofilmingSeasons2and3back-to-back—FoxwillhavefreshepisodesoftheseriesincaseproductionisdisruptedbyanIATSEstrikethissummer.