Isabella Woodville has always lived in her sister's shadow, but her life takes a dark turn when she witnesses a murder at a masquerade ball. Targeted by a masked serial killer after receiving the notorious black invitation, she's kidnapped and brought to a cursed estate. The twisted wager? Fall in love with him within 15 days, and she dies. Resist, and she survives. Caught in a deadly game of love and survival, Isabella must navigate the line between reality and the seductive fantasy she's been thrown into. (Source: Webtoon Entertainment)