准备迎接新生命的孕妇莎拉（瑞秋妮可丝 饰），遇上一场无情的车祸，不仅失去挚爱的老公，车祸也夺走了她的听觉。绝望之际，为了肚裡小孩，她选择重新振作、独自回到郊区的宁静小屋生活，就在日子渐渐恢复平静时，意想不到的厄运却突然在圣诞夜来袭！一名不速之客（萝拉贺林 饰）强行闯入，并趁着莎拉来不及防备时，将她迷昏。但诡异的是，这名抢匪的目标不是任何财物，而是莎拉肚裡的婴儿！这一个漫长的夜晚，一宗骇人的劫孕事件，一个没有出路的密室……孤立无援的莎拉要如何逃出这个人间炼狱？

When Nobody Sees Us is based on the Sergio Sarria novel of the same name.　　Set against the dramatic backdrop of the Spanish Holy Week celebrations, the series is a thriller led by two policewomen trying to solve a series of crimes in the Andalusian town of Morón de la Frontera, in the political and cultural region of Seville’s so-called ‘deep Spain,’ which is home to one of the biggest international U.S. military bases.　　Lucía Gutiérrez is a sergeant of the Spanish Civil Guard investigating the bizarre suicide of a neighbour and strange events that have taken place during the first Holy Week float processions. Magaly Castillo is a Special Agent of the Military Police of the United States Army sent to find out the whereabouts of a missing American soldier who seems to be linked to the shady business of Colonel Douglas Hoopen, head of the Air Force Base, and an underhanded marine, Lieutenant Andrew Taylor. They soon discover that the two investigations are connected.