An Unexpected Yesterday

Printed in Star Trek: New Visions #22, June 2018.
"Unusual readings from the Guardian of Forever brought the USS Enterprise to Gateway's orbiting Science Station 187. Analysis of scan data suggested that the Guardian reset itself, and even the Guardian could not explain the cause of strange temporal distortions. Kirk and Spock stepped through the portal to investigate. They arrive in a parallel universe and encounter a Gary Seven who has never met them."