Tahli Corin’s Girl in Tan Boots has a protagonist you never see on stage. At one point she is represented by a mannequin in a bad wig. The girl in question is missing and the dummy has been set up to jog people’s memories. The thing is, Hannah was, in a sense, invisible even before she disappeared. For the sleuth on her trail, the challenge is to find someone who left the faintest impression on people and then again, might not want to be found.