Tychus Findlay contacts Jim Raynor on Mar Sara, the pair engaging in a business partnership in retrieving alien artifacts for the Möebius Foundation. One such artifact is recovered from the Dominion.
In response to the raid on the artifact, the Dominion declares martial law on Mar Sara, claiming that the retrieval of the artifact was a raid led by insurgents to claim bio-weapons. Kate Lockwell reports on the incident.
The zerg invade Mar Sara, landing at the artifact's dig site. The Raiders hold out long enough for extraction by the Hyperion.
Arcturus Mengsk and the rest of the Dominion Armada arrive, intending to terminate Kerrigan. Valerian and Raynor flee with her, sparking a small scale civil war. Due to her illness, they meet up with Dr. Emil Narud, head of the Möebius Foundation to try to treat her. However, Narud betrays them and makes common cause with Emperor Mengsk. He escapes with the artifact, while Raynor and Valerian escapes, taking Kerrigan to a secret Umojan Protectorate laboratory.
For over two weeks, Valerian subjects Kerrigan to a number of tests, seeing how she reacts to stimuli.
Three weeks after the Battle of Char, Dominion forces track down the Raiders and Kerrigan. Raynor is captured and Kerrigan is seperated from the Raiders. With nothing left save vengeance, she starts reforming the Swarm to achieve vengeance against Mengsk.[note 1]
↑A number of sources listed the events of Heart of the Swarm as occuring in 2506. However, the game's prologue establishes that it begins 3 weeks after the end of Wings of Liberty. However, how much of its storyline bar the original three missions actually occurs in this year is nebulous, as it would have to begin in late November at the earliest, and due to the longer than usual travel time that would be required to travel to Zerus and back, not to mention other locations, it could well extend into 2505.