Kentucky, 1850. An enslaved groom named Jarret and a bay foal forge a bond of understanding that will carry the horse to record-setting victories across the South. When the nation erupts in civil war, an itinerant young artist who has made his name on paintings of the racehorse takes up arms for the Union. On a perilous night, he reunites with the stallion and his groom. New York City, 1954. Martha Jackson, a gallery owner, becomes obsessed with a 19th-century equestrian oil painting of mysterious provenance. Washington, DC, 2019. Jess, a Smithsonian scientist from Australia, and Theo, a Nigerian-American art historian, find themselves unexpectedly connected through their shared interest in the horse.