Ahmad, a trans* man and Iranian expat, arrived in the United States at the beginning of the AIDS crisis. Now in his 60s, he visits Chicago's LGBTQI+ archives in search of his identity. During his research, a friendship develops between him and Kieran, a non-binary archivist in his twenties with a passion for queer culture. Together, they find more than a simple excerpt of history - the steamy gay sauna scene from the 70s and 80s will suck them in, somewhere between fantasy and reality... Desire Lines is a hybrid documentary combining interviews, archives and narrative fiction to explore the complicated and often unwritten history of transmasculine homosexuality, in particular that of activist Lou Sullivan..