A Promise of a Thousand Days tells the story of Aaliyah (Soo Ae) who have Alzheimers Disease and Nico (Kim Rae Won) who loves Aaliya unconditionally. Aaliyah and Nico met through Aaliyah's cousin, Samuel Jang (Lee Sang Woo). As teenagers, Aaliyah and Nico were just close friends. When they became adults, Nico got engaged to his fiancee, Coleen Noh (Jeong Yu Mi) while Aaliyah...