Research scientist Caitlyn Lindsey is convinced that someone is taking out her team one by one. First, a friend and research partner was killed in a home invasion. Three months ago, her boss died in a suspicious car accident. Four days ago, another partner supposedly committed suicide. And now Caitlyn herself has miraculously survived a hit-and-run. Afraid for her life with nowhere to turn, she reaches out to one of the victims' husbands, Detective Josh Solomon. Though initially skeptical about Caitlyn's theory, Josh soon realizes the attack that took his wife's life was anything but random. Now the two of them must discover the truth about who is after Caitlyn's team--and what their end game is--before it's too late.