In 'The Host', the world as we know it has been overtaken by an alien species known as 'souls'. These entities conquer by seizing control of human minds while leaving their bodies perfectly preserved. Humanity is on the brink, but one woman, Melanie Stryder, is determined to resist. When a soul named Wanderer is implanted into Melanie's body, it anticipates the usual human challenges, but the real battle begins when Melanie's consciousness refuses to surrender. Flooded with Melanie’s memories and desires, Wanderer finds herself in a complicated struggle, longing for a person she has never met: Jared, the love of Melanie’s life. Their twisted fates become intertwined as Melanie and Wanderer form an uneasy alliance, driven by their shared affection for Jared, leading them on a perilous quest in a bid for survival and love.