Rebecca Gomperts sails a ship around the world, providing abortions at sea for women with no legal alternative. Her idea begins as flawed spectacle, faced with governmental, religious, and military blockade. But with each setback comes a refined mission, until Rebecca realizes she can use technology to bypass law – and train women to give themselves abortions using WHO-researched pills. From there she creates an underground network of emboldened activists who trust women to handle abortion themselves. Vessel is Rebecca’s story: of a woman who hears and answers a calling, and transforms a wildly improbable idea into a global movement.