"The story finds the Enterprise crew two years into their five-year mission, and they’re starting to become a bit weary from the journey. “They’ve come to rest at a Federation outpost, a sort of diplomatic hub,” says Pegg, who co-wrote the script with Doug Jung.
However, Idris Elba’s villainous Krall unleashes his violence towards the USS-Enterprise and its crew. This leaves the group scrambling and wondering, “What’s the point of it all?” which is the big question that will drive the movie. “We’re gathering a great community within the galaxy, but to what end? What does it all mean?”
A stop for resting. I remember that Kirk and crew took a holiday in "Shore Leave"