Ha-dam (played by Jeong Ha-dam) is a normal teenage girl who lives in an obscure township somewhere in Chungcheong. While a generally happy young woman, Ha-dam does frequently run into the problem of not having very much to do in her spare time, considering the only people she knows are the adults in her immediate family. That changes when the much younger Hae-byeol (played by Jang Hae-geum) comes into Ha-dam's life, claiming to be an obscure relative.
"Ash Flower" is another one of those dual movies, one that's really two stories mixed into one. In this case, the main story is of Ha-dam and Hae-byeol's budding friendship, as Ha-dam's idyllic existence running through the fields and enjoying the country stream is massively improved by having a little sister like person to share it with. These scenes are adorably sweet and optimistic, a testament to the powerful chemistry shared by the lead actresses.