Watching You centres on thrill-seeking paramedic Lina and the fallout of a single decision which threatens to upend her life. Though happily engaged to Cain, a chance encounter with mysterious stranger Dan triggers Lina's desire and culminates in a passionate one-night stand in a WeStay property. In the aftermath, Lina discovers that the affair has been captured by a hidden camera and is blackmailed with the footage. Amid mounting threats and paranoia, she sets out to unmask an insidious voyeur, only to realise that the threat is closer and more dangerous than she could have imagined.