Determined to safeguard her family estate from predatory schemers, visually impaired heiress Christine hires a surrogate donor named Alex to conceive an heir. A chaotic mix-up in the dark lands her in bed with Nathan, a disguised underworld operative who happens to be posing as her father's newest companion.
Unaware that her nighttime lover and her father's sly partner are the identical man, Christine trades barbs with Nathan by daylight while seeking comfort in his embrace after dusk. Nathan revels in the clandestine charade until genuine affection complicates his mission, threatening total disaster when the real donor knocks on their door.
