Polaris learns more about her past and makes a crucial decision that could have impactful consequences. Meanwhile, the Mutant HQ comes under attack and, with everything to lose, relationships are…

Eclipse’s ex-lover returns; Reed and Sage find alarming information about Lauren’s new friend; Thunderbird helps Blink open up about her past; Jace approves a special surveillance program.

Thunderbird coordinates a mission to discover what Sentinel Services had done to an old friend of his and Lauren encounters a new friend with useful powers.