Perhaps the gods are being influenced by some dark force. In the fanfiction, the gods' minds could be clouded, leading them to torture Percy unjustly. It could start with small annoyances like constant bad dreams and escalate to more physical forms of torture like being trapped in a burning maze.
Well, one possibility is that the gods are punishing Percy for some perceived disobedience. Maybe he defied their orders during a major quest and now they're making him suffer. For example, they could be sending him through never - ending trials in a hellish realm.
In this fanfiction, it might be that Percy has some power or knowledge that the gods want to extract from him. So, they use torture as a means to break his will. They could be isolating him from his friends and loved ones, subjecting him to mental and emotional torture as well as physical pain.
In this fanfiction, it might be that the gods are influenced by an external dark force. This force convinces them that Percy is a threat. So, instead of a fair trial, they torture him in front of everyone. Percy, being a hero, would probably endure it with great courage and his friends might be on a quest to prove his innocence and save him from this unjust situation.
One possibility is that there is a prophecy that involves Percy and the hunters in a way that the hunters misinterpret. They believe that by torturing Percy, they can prevent some great disaster. However, Percy is actually an important part of the solution, not the problem. As the story progresses, he could start to communicate with some of the more sympathetic hunters and try to make them see the truth.
In the fanfiction, Percy might sing to the gods as a way of expressing his own internal struggles. He could be feeling lost or confused, and the act of singing to the gods is his way of seeking guidance. He might pour out his heart about his identity as a demigod, his relationship with his father Poseidon, and his place in the world of the gods and mortals.
The plot might involve Percy having to complete a series of difficult tasks assigned by the gods. For example, he could be sent on a quest to retrieve a powerful artifact that has been lost or stolen.
Well, it could be about Percy having a new life in the realm of the gods. Maybe he gets special powers and training from them. He might also face new enemies that are threats to the gods, and he has to use his newfound abilities to protect the divine world.
Perhaps the blessings make Percy a target. Other demigods or villains might be jealous of his new status. He then has to deal with the envy and threats while also trying to figure out how to fully utilize the blessings in a positive way. For instance, the gods' blessings might come with some sort of side - effect that he has to overcome as well.
Perhaps Percy leaves the gods after a great battle. He realizes that the cycle of the gods using demigods for their own purposes will never end. He decides to break free and start a new life. He could be seeking a place where he can be his own master and not be at the mercy of the gods' whims.
One possible plot could be that Percy has finally had enough of the gods' interference in his life and the lives of his friends. He might yell at them for their unfair treatment, like how they often use demigods as pawns in their games. Maybe he'll demand more respect for the sacrifices demigods make.
Chiron could also be a key figure in trying to save Percy. As the centaur trainer at Camp Half - Blood, he has a lot of knowledge and connections. He might try to negotiate with the gods on Percy's behalf or find some loophole in the gods' actions to free Percy.
In this fanfiction, it could start with Percy and his friends being chosen by some ancient force to become gods. As gods, they may have to form a new pantheon. They will need to establish rules and hierarchies within their group. There could be a lot of internal conflict as they each have different ideas about how to use their powers and rule. Some might want to be benevolent and help mortals freely, while others might think that mortals should fend for themselves more. This would lead to a lot of drama and character development within the story.