Commander Shadowsun, scion of the famed Kiru and protégé of the legendary Commander Clear Tide, is destined to lead the next phase of the Tau Empire's expansion... but only if she survives her ordeal. Crash-landing on a hostile planet, surrounded by enemies and with a seemingly impossible mission, Shadow of the Sun is determined to win, even at the cost of his own life. But after receiving a message that causes her entire world to collapse overnight, Shadow Sun must make a choice unthinkable to most Tau: abandon her duty for the sake of her family or continue to fight for the Greater Good.