Following an unconventional and dangerous transit, Picard and the crew finally arrive at Soji's home world, Coppelius. However, with Romulan warbirds on their tail, their arrival brings only greater danger as the crew discovers more than expected about the planet’s inhabitants.

A final confrontation on the synthetics’ homeworld, Coppelius pits Picard and his team against the Romulans, as well as the synths who seek to safeguard their existence at all costs.