"Fangirl" follows Agnes, 28, during a period of three weeks in a New York City spring as she navigates relationships, memories, neuroses, and life as an unambitious artist. A Bennington College alumna with a seemingly useless degree in painting and dance, Agnes struggles to find her purpose in life while immersing herself in the things that bring her her extensive button collection, comic books, heavy metal, and "Star Voyager." In order to establish a reliable routine, she works as a “doorman” at an Upper East Side building... and it’s here, in this complex of luxury apartments, that the mysteries of her past are fastened together.