Lin Yan was originally an ordinary young man. Due to a weekend camping accident, he and three friends who had their own concerns were involved in the alien world "Yunya". They get to know the strange elf A'dong and are told about the "road of no return" they are embarking on. The five-member team experienced "unexpected mistakes" and crises along the way. They experienced ruins exploration, mystery decryption, power pursuit and separation of partners, and they cooperated and grew up in a humorous manner. From initially just wanting to go home, to gradually getting involved in the struggle for the fate of another world, they supported each other and broke through obstacles. Finally, they uncovered the truth under the biggest mystery "The Lost Key" and achieved growth and self-transcendence, but they also ushered in an unexpected ending.
