Perhaps in this fanfic, Beckett has a long - term partner but is bored or unfulfilled in that relationship. Josh comes into the picture, being charming and different. Beckett starts to cheat emotionally first, sharing secrets and deep conversations with Josh that should be reserved for their partner. This gradually leads to physical cheating as well, and the story could explore how they handle the fallout, the reactions of the people around them, and their own internal conflicts.
It might involve Beckett and Josh getting involved in a cheating scenario in a very specific setting, like in a school or a workplace. For example, they could be working on a project together and the long hours and shared experiences draw them closer in an improper way. They then have to deal with the consequences of their actions, like guilt and potential discovery.
The main characters are obviously Beckett and Josh. Beckett seems to be a character who is involved in some sort of relationship that they are about to betray through cheating with Josh.
One possible plot could be that Castle sees Beckett with Josh and it makes him realize his true feelings for her. He might then start to compete for her attention in a humorous and endearing way, like writing a new novel inspired by his jealousy and love for her.
It's possible that Beckett and Josh are characters in a fantasy - themed fanfic. Beckett could be a wizard in training and Josh a brave knight. They secretly meet because there are dark forces in the kingdom that would not approve of their alliance. Their meetings are crucial for sharing knowledge and planning strategies to save the kingdom from impending doom.
In such a fanfic, they could be there for a business meeting. Maybe they meet by chance in the hotel lobby and end up collaborating on a project. Beckett might be a bit reserved at first, but Josh's friendly nature breaks the ice.
Well, they might share some deep secrets. Maybe Beckett has some important information to tell Josh, or they could be planning something together in secret.
One possible theme could be friendship. As they interact in the hotel environment, they could form a deep and meaningful friendship. Another theme might be self - discovery. Maybe through their conversations and experiences together, both Beckett and Josh learn more about themselves.
One possible plot could be that Beckett, after going through a period of self - discovery and growth, meets someone new in an unexpected place, like at an art gallery. They start as friends, sharing their love for art and literature, and gradually fall in love. Beckett decides to remarry because this new person makes him feel alive and understood in a way he hasn't felt before.
It could be about Beckett having a series of strange encounters at the hotel. Maybe he meets an old acquaintance who brings back memories, good or bad. For example, an old friend who he had a falling - out with and now has to deal with the unresolved issues in this new hotel setting.
In the fanfic, it could be that there are signs that Beckett is hiding something. Perhaps he has unexplained absences. He might say he's at work but Alexis can't reach him during those times. Also, he could be overly protective of his phone or personal space, which makes Alexis suspect that he's cheating.
One possible plot twist could be that just before the wedding, Kate discovers a long - lost relative who has some dark secrets that could potentially affect her relationship with Josh. This relative might try to interfere with the wedding for their own reasons.