Synopsis: The Enterprise happens upon a time-rift in space and the world changes around them as the Enterprise-C comes out of the rift. In this new reality, the Enterprise is at war with the Klingons, a war that they cannot win. Also, Tasha Yar is still alive and serving as Tactical Officer aboard the Enterprise-D. The Enterprise-C is critically damaged and was apparently involved in a fight with Romulans while in defense of a Klingon base. The crews eventually realize that, had the Enterprise-C been successful, the current war with the Klingons might never have happened. Clearly, the Enterprise-C must return even though it is likely to never survive the battle. When the Captain of the Enterprise-C is killed during a Klingon attack, Lt. Castillo asks to take the ship back through the warp himself. Meanwhile, Guinan, whose peculiar senses have told her that things are not as they should be, tells Tasha that in the true timeline, Tasha died an empty death. This convinces Tasha that she should return with the Enterprise-C as their tactical officer so that her death can have some meaning, and so she can be with Castillo with whom she has fallen in love.