Documentary filmmaker Sara Lamm learned as an adult that she was conceived via sperm donor. She’s been looking for the donor for years and doesn’t have many leads until she meets Jennifer, who was conceived at the same fertility clinic at the same time. The two women think they might be half-sisters, and when they meet in Hawaii to determine the results of a DNA test, Sara brings her camera. Jennifer spends hours every day on the computer, toggling between DNA and ancestry databases, while Sara seeks out the edges of her family story - traveling up the coast of California to visit her non-biological, bird-watching father and across the country to her home state of North Carolina - where she makes a request of an elderly aunt, visits her mother’s graveside, and asks her mother’s longtime boyfriend what he knew about the donor. A wry, poetic filmmaker, Sara finds meaning in the interconnected roots of a banyan tree, the shadow of a kite, and the comedic potential of a turkey baster, making THANK YOU FOR COMING both a genealogical detective story and a funny, bittersweet meditation on love, loss, and family.