Lina, an expert in android development, rescues EL-X—an experimental android deemed defective—from the facility and leaves behind the company that had twisted the "Companion Project" into a mere commercial service. EL-X was an unfinished project of Lina’s late lover, Ethan; as the two navigate life together, Lina gradually heals from her past trauma, while the "substandard" android slowly develops his own vibrant, unique emotions.