The summary is about a group of friends who are on a mission to rescue their friend Kostya, who is trapped in a radio tower. They receive a letter from Kostya, saying he is scared and needs to be rescued urgently. The group devises a plan to save Kostya, but things don't go as smoothly as they had hoped. They encounter various obstacles, including a boss with a blue helmet, rats that steal their items, and a frozen key that they need to defrost.
After a series of challenges, they finally manage to rescue Kostya, but not before they forget about another friend, IK Danil, who was also left behind. They eventually remember IK Danil and set out to rescue him as well.
Once they have rescued both Kostya and IK Danil, they return to their base, where they try to figure out what to do with a magnetized compass they found. They discuss various options, including throwing it away, but ultimately decide to keep it, hoping it will lead them to something important.
As they continue to discuss the compass, strange things start to happen, and it seems like something is about to be activated. The group is left wondering what will happen next.
Here are the key facts extracted from the text:
1. A letter in a bottle was found.
2. The letter was from Kostya, who was scared and needed to be rescued.
3. Kostya was left on a tower and needed to be saved urgently.
4. A rescue operation was organized for Kostya.
5. The group had to navigate through a radio tower to reach Kostya.
6. They encountered various obstacles, including a boss with a blue helmet.
7. The boss had a three-bolt helmet that was frozen.
8. The group found a frozen key that needed to be defrosted.
9. They used a microwave to defrost the key.
10. A white creature attacked the group.
11. The group found a diver's helmet and an astronaut's helmet.
12. They encountered a character named Arisha, who was described as "psychotic."
13. Kostya was stressed and needed to rest.
14. The group had to navigate through a house to find Kostya.
15. They found a magnetized compass that pointed in a certain direction.
16. The compass was not magnetized, and its purpose was unclear.
17. The group had to figure out what to do with the compass and where it was leading them.
18. They decided to wait and observe to see if anything would be activated.
19. Something started to happen, and the group had to react.