No it’s not what happened to North Korea at all. I have no clue where you got that from.
The collapse of the Soviet Union cutting off food, fuel, fertilizer, and technology support started it.
Then torrential rainfall and flooding destroyed that years crop and food storage in the main production regions. It also destroyed many of their hydroelectric dams and irrigation systems. Without support from the soviets they had no way to repair them.
However the main reason hundreds of thousands of not millions died was because of the governments unwillingness to open their borders for international aide/trade. The government deliberately starved their population.