Here is a concise summary of the provided transcript:
**Setting:** A post-apocalyptic world with zombies and mutants.
**Plot:**
* The narrator and their team observe that zombies are disappearing due to a serum's effect.
* They plan to attack a castle, the base of the "main demon," before the serum's effect wears off (in 3-4 days).
* The team launches a final battle against the demon's minions and the demon itself in the castle.
* Despite being heavily outnumbered and outgunned, the narrator and their team fight bravely, using tactics, grenades, and force fields.
* Ultimately, the narrator appears to be the last one standing, having defeated the demon, but at the cost of their entire team.
**Aftermath:**
* The narrator, severely weakened, reflects on the victory and the losses suffered.
* They discover a bag of cartridges and a fallen fighter, then declare victory.
* The narrator plans to return to base, where they will inform the others of the demon's defeat and the team's sacrifice.
**Ending:**
* The narrator, identified as "Jasper," is welcomed back to base, where "Doctor Karpov" congratulates them on their victory.
* The video ends with a message thanking viewers for watching, asking for subscriptions, and including a cryptic warning.
Here are the key facts extracted from the text, without opinions, with each fact numbered and in short sentences:
1. **Zombies are disappearing** all over the city.
2. A **serum** has been deployed, which is likely causing the zombies' disappearance.
3. The group is **returning to the old city** to check the serum's effects.
4. **A helicopter is available** on the roof for transportation.
5. The group **travels to the Capitol** to investigate zombie movements.
6. **Zombies are moving north** towards the outskirts of the city, to a castle.
7. **A scout reports** on zombie and mutant activity at the castle.
8. The group discovers a **base of demonic minions** within the castle.
9. A **main demon** is identified as the primary target.
10. **The serum's effect is temporary** (lasting a few days) and doesn't work at the castle due to a **"place of power"**.
11. **All zombies in other cities have died**, but those at the castle remain.
12. The group **launches a final attack** on the castle to defeat the demon.
13. **A last battle ensues** with numerous zombies and mutants.
14. **The group suffers losses**, including the death of a character named Bison.
15. **The demon is ultimately defeated**.
16. **Only one fighter, Jasper, survives** alongside the narrator.
17. **The survivors return to base**, marking the end of the conflict.
18. **Doctor Karpov confirms their victory**.