Here is a concise summary of the story:
**Title:** The Legend of Lake Toba
**Summary:**
* A young farmer, Toba, catches a magical fish that transforms into a beautiful woman, who was a princess cursed by the gods.
* Toba marries her, and they have a son, Samosir, who grows up lazy and spoiled.
* When Toba scolds Samosir, calling him a "lazy fish", he unintentionally breaks a promise to his wife, triggering a curse.
* As a result, a massive flood occurs, sweeping Toba away, and his wife transforms back into a fish.
* Their son, Samosir, survives by fleeing to a hill, which becomes known as Samosir Island, surrounded by the newly formed Lake Toba.
Here are the key facts extracted from the text, without opinions, in short sentences with numbers:
**People and Relationships**
1. Toba is a young man who lives in a fertile valley in North Sumatra.
2. Toba works as a farmer and sometimes fishes in a nearby river.
3. Toba meets a woman who was once a princess, cursed to be a fish.
4. The woman and Toba get married.
5. Toba and his wife have a son named Samosir.
**Events**
6. Toba catches a large, beautiful fish with golden scales while fishing.
7. The fish transforms into a woman (Toba's future wife) after being caught.
8. The woman reveals she was a princess cursed by the gods to be a fish.
9. Toba's wife gives birth to a son, Samosir.
10. Samosir grows up to be lazy and naughty, often spoiling his parents' plans.
11. Samosir is tasked with delivering his father's lunch but eats most of it on the way.
12. Toba scolds Samosir, unintentionally breaking a promise to his wife.
**Consequences and Outcomes**
13. Toba's broken promise triggers a disaster: a massive flood.
14. The flood transforms Toba's wife back into a fish.
15. Toba is swept away and drowns in the flood.
16. Samosir escapes the flood by hiding on a hill.
17. The hill where Samosir hides becomes known as Samosir Island.
18. The floodwaters form a lake, later known as Lake Toba.