Well, it could be about Naruto growing up feeling the pain of abandonment by his mother Kushina. Maybe he struggles with self - worth and has a hard time trusting others. He might constantly wonder why she left him and have to face the world alone without a mother figure.
Obviously Naruto would be the main character as the story is about him being abandoned by Kushina. Kushina herself would also be an important character, even though she abandoned Naruto. Her presence, either in flashbacks or if she reappears later in the story, would be crucial.
One possible plot could be that Naruto is somehow sent back in time and meets his mother Kushina. He gets to know her as a person, not just as the mother he never really knew. They could train together, and Kushina could share some of her unique Uzumaki clan techniques with Naruto.
The plot could revolve around a mystery in the village that only Kushina, Mikoto and Naruto can solve. Maybe there are strange disappearances that are related to an ancient power that was once sealed by the Uzumaki clan and has some connection to the Uchiha. Kushina uses her knowledge of the Uzumaki history, Mikoto her understanding of the Uchiha lore, and Naruto his unique perspective as the Jinchuriki of the Nine - Tails. They have to overcome their differences and work together to save the village from this hidden threat. Along the way, they develop a deeper bond as they face various challenges.
A simple plot could be Kushina's adventures as a young ninja. She goes on missions, faces various enemies, and discovers new jutsu. For example, she could be part of a team that has to retrieve a powerful artifact from a dangerous location.
Well, the plot might involve Kushina seeing Naruto's potential right from the start and training him intensively. She could also share her own experiences of growing up as an Uzumaki, which could help Naruto better understand his heritage. And perhaps they go on special missions together where Kushina guides Naruto not just in combat but also in making tough decisions. There could be a lot of emotional moments as Kushina fills the role of both a sensei and a mother - like figure to Naruto. Also, Kushina could introduce Naruto to other Uzumaki - related things like ancient seals or special chakra control techniques that were unique to their clan.
One possible plot could be that Kushina is somehow influenced by an evil force. This force makes her believe false things about Naruto, like he's a threat to the village in the future. So, she betrays him by revealing his secrets or trying to harm him. Maybe she spreads lies about him which turns the villagers against Naruto even more.
Well, one possible plot is that Naruto is left all alone at a very young age by Kushina. This makes him an outcast even more so in the village. He might start to question his identity and purpose. He could end up having a different set of friends or allies, perhaps those who are also outcasts. And as he grows, he has to face the fact that his mother abandoned him while still trying to protect the village that didn't always accept him.
Maybe the 'plug' could be some sort of new jutsu or device in the 'Naruto' universe. The plot could involve Kushina using this 'plug' to gain new powers and protect Konoha. It could also be related to her connection with Naruto, perhaps she discovers this 'plug' has something to do with Naruto's future power or his role in the village.
It could also be that the 'enslaves' part is not literal in the sense of physical slavery. Perhaps Naruto has some kind of mental hold over Kushina. For example, he might have discovered a way to manipulate her memories or emotions, which gives him a form of control. This would be a more psychological form of 'enslavement' and could lead to a complex and twisted plot.
In the 'dark naruto abandoned by kushina fanfic', Naruto could be shunned by the village due to his mother's abandonment. This isolation drives him to the dark side. He may learn unique and forbidden jutsu from mysterious sources. His goal could be to reshape the ninja world in a way that would make those who abandoned him regret their actions. He might also have internal struggles between the remnants of his good nature and the new - found darkness within him.