Nancy continues to come into her own in the fourth season, taking an even more active role in saving Hawkins.
She, along with the other Hawkins-based characters, works to investigate the latest strange happenings in town, eventually getting involved in the fight against Vecna. While helping rescue Steve from the Upside Down, Nancy is briefly captured by Vecna, who shows her a vision of his evil plan for Hawkins and the rest of the world.
During the final battle, Nancy — with backup from Steve and Robin — gets to set Vecna ablaze, but their efforts aren't fatal to the monster. Nancy wraps up the season reuniting with Jonathan and tiptoeing around the issue of their future plans.