The Great Game (2018)

An old, ailing general is losing his memory. His anarchist son wants to connect. They share a passion for the Wild East, where grandfather was a famous explorer among Mongol tribes. He died under mysterious circumstances in 1948 in Afghanistan. Rumors say he was a British agent and gunrunner. Michael, the grandson, takes his father Søren out of the nursing home. He wants him to taste life, and he wants them to spend time together. The odd couple travel across China. They encounter temples, chiefs, and ancestors who reveal that the grandfather was a true Lawrence of the East. A man who fought to unite the Mongol tribes and defend them against the Soviet Reds.

Unfortunately the movie The Great Game is not yet available on HBO Max.