In season five, the crew of the U.S.S. Cerritos is tasked with closing "space potholes" – subspace rifts that are causing chaos in the Alpha Quadrant. Pothole duty would be easy for Junior Officers Mariner, Boimler, Tendi and Rutherford ... If they didn't also have to deal with an Orion war, furious Klingons, diplomatic catastrophes, murder mysteries and scariest of all: their own career aspirations.