One year after the events of "Shadow Circuit," Dr. Lila Chen—The Echo—faces her greatest challenge yet when her long-presumed-dead brother Lucas emerges as "The Dissonance," a powerful consciousness architect with a corrupted vision of transcendence.

Having survived Resonance Prime through a different evolutionary path, Lucas has developed a hybrid consciousness technology that combines evolved understanding with technological precision, but twisted toward domination rather than healing. His neural interface creates purple-black energy signatures that can override and alter other consciousness patterns, forcibly connecting minds to his growing network.

As The Dissonance begins systematically targeting both the Collective's facilities and the Research Foundation's implementation sites, Lila must draw on the full extent of her evolved Echo abilities. With her twin sister Natalie, she must confront not just a powerful adversary but someone who shares her DNA and once shared her dreams.