In 2293, General Chang was part of the Klingon delegation aboard Kronos One, which was transporting Gorkon to Earth for historic peace talks. Chang came aboard the Enterprise-A, the Federation's escort ship, for a diplomatic dinner. Chang delighted meeting Captain Kirk, whom he regarded as a fellow "warrior." However, Chang later charged and arrested Kirk and Dr. McCoy for the murder of Gorkon, and successfully prosecuted them on the Klingon homeworld.
Chang put on a good show in the farcical trial, all along covering up his role in Gorkon's death from his Klingon colleagues, including the newly-installed chancellor - and Gorkon's daughter - Aztbur. Chang apparently arranged for a cloaked Bird-of-Prey to fire upon Kronos One - while cloaked - and knock out its gravity. This covert attack allowed two "hit men" to beam aboard from Enterprise and murder an off-guard Gorkon, effectively framing Kirk.
Chang was fond of quoting Shakespeare for virtually any occasion, especially aboard the prototype Bird-of-Prey during his final showdown with Kirk. When he realized that the Enterprise's torpedo could detect his ship's plasma signature and ultimately seal his fate, his final words were: "To be or not to be".