Secret of the Heart is a 1998 TVB production that was first aired from February 16,1998 to May 10, 1998. The drama had a powerful roster that is made up of Gallen Lo, Felix Wong, Amy Kwok, Kathy Chow, Sunny Chan, Ada Choi, Jessica Hsuan and Nick Cheung. It won three TVB Anniversary Awards, including Best Actor for Gallen Lo, Best Actress for Ada Choi and Best On-Screen Improvement Award for Nick Cheung.

The drama also received a late night hour rerun during 2003 and 2010. It was digitally remastered for the 2010 rerun.

Follow the touching stories of people who have suffered a lifetime of separation and are yearning to be reunited with their birthparents and biological families or find children they had to place for adoption long ago.