Jim wants her to drop thoughts of revenge and Kerrigan feels like they can’t move forward together until Emperor Mengsk is dead, and we finally get to see some of the character arcs that began all the way back in the original StarCraft come to fruition. After a series of tests that serve as Heart of the Swarm‘s tutorial, the reunited ex-marshal and Ghost-trained psychic plan to fly off into the sunset together and/or go after Emperor Mengsk, who was responsible for Kerrigan being captured by the zerg in the first place. Spoilers for Wings of Liberty: at the end of the last outing Jim Raynor used an alien artifact to return Sarah Kerrigan to normal, well sans the zerg inspired dreadlock hairdo.
The story is compelling and interesting enough to make you constantly want to see more, but Heart of the Swarm does slip up in its story telling a little.
