Deputy Tanner Dempsey and Bree Daniels are tasked with unraveling a deadly mystery in Dallas--one that involves transmitting live feeds of victims trapped in tanks as they fill with water. Bree's computer genius is their only hope at solving the crime. Knowing the darkness in Bree's past, Tanner is determined to make sure she comes out of this emotionally unscathed. Especially once they both become a killer's next target...