The only known antidote, which must be administered before the 20-hour window closes.
Ethan must fight his way through Ambrose’s stronghold to retrieve the Bellerophon antidote before Nyah dies. Chimera - Mission Impossible | Fandom
A deadly, genetically modified virus that kills its host within 20 hours through massive internal destruction.
In Greek mythology, the hero Bellerophon defeated the monstrous Chimera. Dr. Nekhorvich, the virus's creator, purposefully gave them these names to reflect the "hero" (cure) and "villain" (disease). Key Story Beats
During a raid to destroy the virus, Nyah injects herself with the last remaining sample of Chimera to prevent Ambrose from obtaining it.
The "deep story" is built around two biological agents named after Greek myths:
Ethan is ordered to recruit Nyah Nordoff-Hall, a master thief and Ambrose's ex-girlfriend, to infiltrate Ambrose's inner circle.
Sean Ambrose, a disavowed IMF agent and Ethan Hunt’s former "double," steals Bellerophon after murdering Dr. Nekhorvich.
