第四季講述海軍驅(qū)逐艦Nathan James的艦長Tom Chandler（Eric Dane飾）卸下自己的英雄身份及職責(zé)，與家人隱姓埋名住在希臘一個小漁村里；此時Slattery（Adam Baldwin飾）及船員發(fā)現(xiàn)病毒雖然沒法感染人類，但卻變種成能感染全球的糧食作物，令人類面臨全球性的饑荒危機。

　　Chatfah, the youngest sister of the Bupphachinda family, has just received the largest share of her father's inheritance and is about to be married. However, Chatfah falls from the highest floor of a vacation home to her three older sisters' shocked eyes. When her body disappears, her three sisters—Baibua, Chomphu, and Picha—become suspects in her disappearance.
　　The eldest sister Baibua is composed, wise, and has always sacrificed for her family. The second, Chomphu, is a confident model whose boyfriend Chatfah stole and was engaged to. The third, Putpichaya, is a jewellery designer and the closest to Chatfah. The three search for Chatfah while further tragedy befalls them following their youngest sister's disappearance.
　　When no one else can be trusted, the three sisters must try to trust one another. They move back to their childhood mansion to find out who was behind Chatfah's disappearance, which could very well be one of them.

此劇講述了通過電話連接過去的2020年的女人和2015年的男人一起救出了被殺害的總統(tǒng)而發(fā)生的時空政治驚悚劇。