Firefly was canceled too soon. Released in 2002, the series took place in the year 2517. Classified as a space Western drama, the series saw the ensemble cast (lead by Nathan Fillion, Gina Torres, and Alan Tudyk) travelling on the spaceship Serenity in search of new adventures.

from Pocket –https://movieweb.com/heres-what-to-expect-from-the-firefly-reboot-from-disney-plus/