In this program, pairing the new-generation actors TSENG Ching-hua and Berant ZHU, they travel around Taiwan in their van, the Erdai, and must complete eight major coming-of-age tests. These tests range from stepping out of their comfort zones to swimming to an uninhabited island off Lanyu, gaining a sense of responsibility by earning their room and board on Matsu, and carrying heavy loads as they join Bunun tribe members on a search for their roots. As the two young men reach age 25 during their journey, they face tests of strength and endurance, challenges to their values, and inner struggles. Simultaneously, they strive to uncover the secret of adulthood. Can these two clueless youths conquer their daunting challenges and successfully transform themselves into adults?