Here is a concise summary of the provided transcript:
**Initial Scene:**
* A family discovers a surprising truth: the father's long-lost brother, Rudolph, a scientist, might be alive.
* A mysterious package arrives with a strange phone; when the father answers, he disappears.
**Main Plot:**
* The children, Sonya and Nastya, investigate and suspect the involvement of supernatural entities, Valak and La Llorona, who had previously threatened them.
* They seek help from Baku, a "Dreams Eater" spirit, who agrees to assist.
* Baku's investigation leads to a surprising twist:
**Twist and Resolution:**
* The children encounter Rudolph and his daughter, Angelica, who resemble them.
* It's revealed that Rudolph, an inventor, sent the package with a teleporting phone, which malfunctioned, causing the father's disappearance.
* Angelica and Rudolph were trying to surprise their relatives but ended up causing chaos.
* With the issue resolved, the family is reunited, and the mysterious events are explained as a result of Rudolph's inventive mishap rather than supernatural interference.
Here are the key facts extracted from the text, numbered and in short sentences, excluding opinions:
**Family Relationships**
1. Rudolph is the brother of Gregory (also referred to as Grisha or Uncle Grisha).
2. Angelica is Rudolph's daughter.
3. Sonya and Nastya are sisters.
4. Sonya and Nastya are second cousins to Angelica.
**Events**
5. Rudolph had been out of contact with his family for many years.
6. A package was sent to Sonya's household with a mysterious phone inside.
7. Gregory (Sonya's father) answered the phone and subsequently disappeared.
8. A note in the package read "We're back!"
9. Baku, an ancient and intelligent spirit, was summoned to help find Gregory.
10. Angelica and Rudolph arrived at Sonya's household, claiming they had nothing to do with Gregory's disappearance.
**Locations and Movements**
11. Rudolph was summoned to a closed city (similar to Seversk) many years ago.
12. Angelica and Rudolph used a teleporter to quickly arrive at Sonya's location.
**Objects and Technology**
13. The mysterious phone had no wires.
14. The phone was later revealed to be a teleportation device created by Rudolph.
15. A book was mentioned as being heavy, carried by Angelica.
**Other**
16. Valak and La Llorona were previously defeated by the characters but had left a recording saying "We'll be back".
17. Baku was going to help find Gregory but instead interacted with Angelica and Rudolph.
18. Gregory was returned safely at the end, with Rudolph and Angelica resolving an "annoying oversight".