Star Trek #24: Killing Time

Second History: a Romulan time-tampering project that has transported the Enterprise and the galaxy into an alternate dimension of reality. Now, Kirk is an embittered young ensign and Spock is a beseiged Starship commander.
Lured into a Romulan trap, Captain Spock and Ensign Kirk must free themselves from both their captors and their own altered selves...before the galaxy hurtles toward total destruction!