Country pop singer Kayleigh Towne, having had an innocent exchange signed XO with fan Edwin Sharp, finds herself the target of his obsession, and, when an accident occurs at the concert hall where Kayleigh is rehearsing, the tension escalates. Soon a member of the road crew is murdered and California Bureau of Investigation agent Kathryn Dance, who is also Kayleigh's friend, investigates using her body-language analysis skills to catch the killer.