Luke gets up early on two of Vietnam's southern islands to learn about sea turtle conservation.

Luke travels to mountainous Da Lat and bustling Ho Chi Minh City. He enthuses about the street food, learns about a groundbreaking approach to farming and meets with artistic Australians.

In Hanoi, Luke learns about the work of KOTO, a pioneering social enterprise, and enjoys some of his favourite street food, including Cha Ca, the city's signature dish.