Woody knows that his mission in this world is to take care of his master, whether it is the original Andy or the new master Bonnie. When Bonnie brings home the reluctant toy "Forky", Woody takes on the responsibility of teaching Forky to accept his new identity. However, when Bonnie takes all the toys on a family trip in the RV, Woody and his friends will embark on a new adventure together, appreciate how vast the world outside the room is, and even meet their old friend Shepherdess. After years of wandering alone, Shepherdess has become adventurous and is no longer just an exquisite doll. Just as Woody and Shepherdess discover that their missions for toys are very different, they soon realize that a greater threat is coming...