Henley Dress

I am a relative novice and I am terrible at looking at the patterns to create a "hack". I fell in love with this tea collection dress...anyone know which O+S pattern could become this? (Specifically concerned about how to make a placket in the skirt area) http://www.teacollection.com/product/5f32315/baby-girls-henley-dress-cochabamba-henley-dress.html Thanks!