A plot could involve Percy's friends being bribed by an enemy. They start to undermine Percy's plans and steal his ideas. Percy is left confused and heartbroken. He tries to find new allies but faces many difficulties as everyone has been poisoned against him by his former friends. He has to fight not only his external enemies but also the emotional turmoil caused by the betrayal.
One possible plotline could be that Percy discovers his so - called friends have been secretly working against him all along. Maybe they spread false rumors about him, which makes everyone in his world turn against him. He then has to go on a journey alone to clear his name.
A plotline might involve Ash being betrayed by a new acquaintance he meets on his journey. This person could pretend to be his friend, gain his trust, and then use that trust to steal his Pokémon or important items. Or perhaps Ash is betrayed by a Pokémon he just caught. The Pokémon could have been planted by an enemy trainer to spy on Ash and then turn on him at a crucial moment.
Well, perhaps in the fanfiction, Annabeth betrays Percy's trust in a relationship way. She could start seeing someone else and use Percy's secrets against him to make herself look better in front of the new person. Or she might side with a group that Percy is against, believing their lies and false promises over Percy's warnings. This could lead to Percy feeling completely alone and having to find new allies.
One possible plotline could be that Percy and Nico are betrayed by a close friend within the demigod community. Maybe they are framed for a crime they didn't commit, like stealing a powerful artifact from the gods. This could lead to them being hunted by other demigods while they try to clear their names.
One possible plotline could be that Percy's sacrifice leads to a new era of peace in the fictional world. His death might inspire the other characters to come together and fight against the common enemies more fiercely. For example, his friends could form a stronger alliance to protect the world he gave his life for.
One possible plotline could be Percy's journey of dealing with the diagnosis. He might initially be in denial, then gradually accept it and start treatments. Another could be how his friends and family react, like his friends rallying around him to keep his spirits up.
Well, it could start with Percy being framed for a crime he didn't commit by the gods. This false accusation makes him feel extremely betrayed. He then has to go on the run while trying to prove his innocence. Along the way, he meets other outcasts and together they form a resistance against the gods. They might try to find a way to hold the gods accountable for their actions and create a new order where demigods are treated more fairly.
Perhaps in the fanfiction, Percy is influenced by some dark magic or a curse that makes him betray the son of chaos. The son of chaos then has to decide whether to forgive Percy or seek revenge. The story could also explore how their friends and allies are affected by this betrayal and whether they side with Percy or the son of chaos.
Well, the fanfiction might show Percy being betrayed in a very personal way. For example, a god he trusted deeply, like Poseidon, could turn against him for some political reason among the gods. Percy would then be heartbroken and angry. He might embark on a journey to find a new purpose, away from the world of the gods. Along the way, he could meet new characters who help him see the true nature of the gods and himself.
In this fanfic, it could be that Percy and Jason are under the influence of a magical spell or a powerful charm. This influence makes them act against their normal moral compasses and betray their friends. The story could then focus on how their friends try to break the spell and bring them back to their side, while also dealing with the consequences of their betrayal.
A third plotline could be about Percy's mental and emotional state during his banishment. He could be dealing with feelings of betrayal, as he was banished. He might question his identity and purpose, and throughout the fanfiction, he gradually overcomes these doubts and insecurities, emerging stronger in character even if he's still trapped in Tartarus.