Of course, I'd be happy to help.

Okay so NGuma has a bad temper. His dark secret is that he was shunned by the members of his former clan. This makes him unwilling to trust anyone so he could boss the hyenas around and come across as a bit of a bully.
The hyenas (Shenzi, Banzai and Ed) could really hate him at first. Shenzi (being the smartest one of the group) could go to NGuma and try to stop him from being so nasty.
He could argue back at the start of the conversation but then (after a bit of persuasion from Shenzi) tell her the truth and say that he was shunned from his past clan. After hearing this, Shenzi could feel sorry for him and the two begin to fall in love.
This would make Banzai jealous (he could have secretly liked Shenzi) and tries to fight with NGuma. Horrified, Shenzi stops them fighting and reminds them that they are all a clan and should stick together. (A bit like the Lion King 2, the song We are One.

)
Then Banzai realizes he shouldn't have started fighting with NGUma and all the hyenas stay as a happy clan.
If you need anymore help with the plot, please ask!
