"Betrayal, Part 1 of 4"
The events in this arc take place in the weeks just prior to Star Wars: A New Hope.
*Beginning a new ongoing series set during the era when Emperor Palpatine held the galaxy in his iron grip! Even as Rebel forces make their first tentative attacks against the Empire, a plot is brewing within the ranks of those the Emperor and Darth Vader count as loyal to their cause. A small cabal of disaffected Imperial officers have targeted their masters for death, with the goal of taking over the Empire themselves. But in the midst of a conspiracy that includes hired assassins and a private army, there are those who have no intention of sharing power with their co-conspirators... *Source: darkhorse.com