Six-year-old Ivy lives in a crowded orphanage with a secret spiritual gift: she sees the radiant aura of human souls, where crimson denotes authentic compassion and pitch-black signals murderous depravity. When an aristocratic billionaire couple arrives seeking an adoptive daughter, Ivy's closest friend Ashley ignores her frantic warnings, eagerly choosing the rich family for luxury. Ivy instead selects a working-class carpenter and his wife, whose austere expressions hide glowing red hearts.
While Ivy thrives in a warm, loving household, Ashley discovers too late that the wealthy mansion is a gilded house of horrors run by sadistic abusers. Desperate to escape her nightmare, Ashley tracks down Ivy and creates a vicious public scene, demanding they trade adoptive parents. But Ivy stands firm with her true family, using her supernatural insight to expose the abusers' crimes.
