Here's the blurb for the story that brings the Shenzhou and Discovery characters to the game:
The U.S.S. Shenzhou has arrived in the present day with a bang: the ship appears to be enveloped in a new form of temporal anomaly which can travel with her. As the Shenzhou moves across the Alpha Quadrant, she leaves a trail of disrupted chronitons and displaced people behind it, bringing fresh chaos to the galaxy you have been working so hard to keep intact. Worse yet, the Shenzhou is not responding to hails from Starfleet or anyone else. We are concerned that something terrible has befallen the Shenzhou and her crew. It’s up to you to chase down the Shenzhou, determine the fate of her crew, and stop the new wave of destruction to the timeline.New characters are also being introduced to the game, with Captain georgiou and T'Kuvma joining the previously announced Michael Burnham and Saru.