Nae Namja Juingongeul Jikineun Bangbeop

Overcome with grief, Iris cradles her dying husband, Crown Prince Cedric, who was betrayed by her own bloodline. Suddenly, she's transported to another dimension where Cedric's life is written in a book, and pleads for the power to change the ending. That's when Iris is sent back to the time before her marriage, armed with the knowledge of impending treachery and determined to reshape Cedric and her destiny. As the past unfolds anew, Iris must outmaneuver both her family and the emperor to secure a future for them both. But can she truly alter fate, or is tragedy inescapable? (Source: Tappytoon)