A Pledge to God (Korean: 신과의 약속) is a South Korean television series starring Han Chae-young, Bae Soo-bin, Oh Yoon-ah and Lee Chun-hee.

The series aired four episodes every Saturday on MBC TV from 20:45 to 23:10 (KST), from November 24, 2018 to February 16, 2019.

Little Hyeon Woo is gravely ill and needs a bone marrow transplant.

His doctor advises his parents that the cord blood of a sibling could be a potential donor.

The first script reading took place on October 5, 2018 at MBC Broadcasting Station in Sangam-dong, Seoul, South Korea.