In 1972, married biologists George Hunt and Molly Warner make an unprecedented discovery while studying seagulls on one of California’s Channel Islands. To their surprise, a great number of the nesting pairs they observe are both female. George and Molly’s research on “lesbian seagulls” quickly triggers both outrage and jubilation in a nation grappling with the rise of the LGBTQ+ rights movement, and it threatens to tear apart their own relationship.