Following restorations to 15th-century Buddhist monasteries in the Himalyan kingdom of Mustang, a Tibetan enclave in present-day Nepal. “The Buddha says that everything is impermanent,” notes cleric Sakya Trizin, and that includes Thubchen, a royal monastery in Mustang's capital, LoManthang. Leaks from the roof are wreaking havoc on artwork on the walls. Restoration techniques similar to those used in the Vatican's Sistine Chapel are applied. Liev Schreiber narrates.