Ocean's Echo is a stand-alone space adventure set in the same universe as Winter's Orbit. It follows the story of Tennalhin Halkana, a neuromodified mind reader who is conscripted into the military and placed under the care of Lieutenant Surit Yeni, a neuromodified architect who can influence minds. They fake a sync bond and plan Tennal's escape during a salvage-retrieval mission into chaotic space.