I need some help with a genshin one shot im going to run

you have been charged with a crime you did not commit and have decided to request a Duel in order to prove your innocence, meanwhile your friends rush to find evidence that you were framed, as the clock ticks down and you fight for your life, will your friends prove that you are in fact truly innocent or will you die in the ring trying to prove this fact against the infamous les Diables Bleus

in short i need some help with the plot and how things go down, help will be much appreciated

currently one of the players is being accused of murder via using automatons and i need assistance to figure out how exactly the party is going to prove their innocence, meanwhile the player is going pvp against an npc i have based on my first dnd character