Cold-blooded escort Kian awakens an escort system after his escort agency was massacred three years ago. He takes a high-risk S-rank mission to deliver young Sorrel, who carries a dangerous demon seed sealed inside her body. On their perilous cross-country journey, they encounter paper spirits, water ghouls and countless assassins sent by the treacherous Xuanyou Sect. Hidden sect conflicts, twisted family secrets and a spy disciple tear them apart repeatedly. Kian grows stronger through life-or-death fights, while Sorrel gradually abandons her fragility and learns to protect herself. Together they expose the sect’s cruel sacrifice scheme meant to resurrect an ancient evil, dismantle the evil organization, and free Sorrel from the demon seed’s bondage. The two traumatized souls forge an inseparable bond amid constant danger and revenge.