In 1957 California, “Pastime” unveils the tale of Roy Dean Bream, a 41-year-old pitcher on the verge of retirement playing for the minor-league team, the Steamers. Recounting his brief major league stint where legends like Stan Musial once hit a grand slam against him, Bream’s journey takes an unexpected turn when the team recruits 17-year-old Tyron Debray, a prodigious black pitcher.

As the duo forms an unlikely bond amidst racial tension and adversities, they find camaraderie in their shared love for baseball. However, shadowing their relationship is Bream’s concealed heart condition, and while he wishes to witness Debray’s ascendancy, he also silently yearns for one final shot at baseball glory before bowing out.