It's likely about a cartel named 'the frogs' (literal translation). Since it's based on a true story, it might involve real - life events related to a criminal organization, such as their operations, the people involved, and the impact on society.
In most cases, 'El Rey' is not based on actual events. It's more of a fictional narrative crafted for entertainment purposes. The plot and characters might be inspired by various elements but not by real-life happenings.
I'm not entirely sure about specific facts without more research, but it could be that the cartel had some very unique ways of operating. Maybe they had a particular code or system within the group that was different from other cartels.
Since I don't know the exact 'el rey based on a true story', I can only guess. It could be that 'el rey' was a historical or contemporary figure. If it's a historical account, it might detail the political, social or cultural environment of the time. For example, if he was a king in a certain era, it could tell about the wars he fought, the alliances he made, and how he influenced the development of his kingdom. It could also explore his personal life, his family, and his beliefs.