Both stories unravel after a murder has occurred, already pointing fingers to obvious characters, the characters tell the story about how they met the women who were murdered at the beginning, both have similar plots such as an affair due to their child’s learning and different assumptions of who the killer is, the suspense leaves you craving to know more
Both dramas are detective stories and explore motherhood and the friendships between female characters.
SKY Castle and Secret Mother both have parents who entrust their child's academics to a "coach" who has a mysterious side to them. Both shows' coaches are working for the families with hidden agendas. The shows both also have mothers that would do anything for their child. One of the biggest differences, though, (other than the intentions behind each coach) is that Secret Mother focuses more on one family rather than multiple ones like SKY Castle.



