The mutants devise a plan to take down Sentinel Services; Eclipse looks to an old friend to obtain information; Lauren and Andy attempt to combine their powers to help the group.
Jace, motivated by a tragic event from his past, throws all the power of the Sentinel Services into finding the Mutant Underground Way Station; Blink's vivid dreams lead her to confront Dreamer.
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.
The group faces a threat when they discover a new refugee is a spy working for Sentinel Services; Reed visits his estranged father and learns secrets that could prove useful.
Jace is forced to hand over something valuable to Dr. Campbell; the team is divided on what they should do next, so Reed and Caitlin take matters into their own hands.