In this fanfiction, it could start with Danny Phantom turning evil due to an experiment gone wrong. As for Sam, she has always had a special relationship with plants. The evil Danny might start to use plants as his minions, controlling them to do his bidding. Sam, seeing this, decides to take matters into her own hands. She begins to study ancient plant lore to find a way to break Danny's control over the plants. Along the way, she might face many challenges, like Danny sending his plant - minions to attack her. But she doesn't give up, as she is determined to save Danny from his evil state and restore the balance between the supernatural and the natural world.
Well, it would be the evil Danny Phantom. Consider this: he has gone through some transformation that has made him evil. Now he is using plants in ways that are harmful or against the natural order. Sam, who has a connection to plants and a moral compass, is in direct opposition to him. He creates the conflict in the story by his evil deeds, and Sam has to find a way to overcome his actions, so he is the main antagonist.
Their relationship could develop as they face challenges together. For example, if a new type of ghost - eating plant appears in town, Sam's knowledge of plants and Danny's ghost - fighting skills would make them a great team. Through working together to deal with this threat, they would grow closer and start to trust each other more deeply.
Well, perhaps in the future, Danny and Sam get married. They have a family and are trying to live a normal life, but their past as ghost hunters keeps coming back. Their kids start to show signs of having special powers or an interest in the supernatural. Sam and Danny then have to teach them about the world of ghosts while also protecting their family from old enemies that resurface.
A really cool plot could be that Sam is given a rare plant seed by a mysterious figure. When she plants it, it grows into a giant, sentient plant. Danny at first is wary of it, but they soon find out that the plant is actually friendly and has some knowledge about Danny's ghost powers. Together, they use the plant's abilities to fight off a powerful ghost that is threatening their city.
The plot could involve some sort of mystery related to the pregnancy. Like, there could be a ghostly force that is either helping or hindering the pregnancy. And they have to figure out what it is and how to deal with it. Also, their friends like Tucker could play important roles in supporting them.
One popular Danny Phantom, Plant, and Sam fanfiction might be 'Green Ties' which explores Sam's connection to plants in the context of the Danny Phantom universe. It delves into how her love for nature and her relationship with Danny play out with plant - related elements.
Well, perhaps in the fanfiction, Danny and Sam have been through a lot together, like countless battles with powerful ghosts. One day, Danny decides it's time to propose to Sam in a very special way. He takes her to their favorite haunt (pun intended), a place where they first discovered a powerful ghost artifact. There, he gets down on one knee and asks her to marry him. And of course, she says yes.
One possible plot could be that Danny and Sam decide to spend Christmas helping the ghosts who are usually left out during the holiday. They could use Danny's powers to bring some holiday cheer to the Ghost Zone. For example, they might organize a little Christmas party with ectoplasm - made decorations and treats that ghosts can enjoy.
One possible plot could be that Danny and Sam face challenges in raising their baby while also dealing with Danny's ghost - fighting duties. Maybe the baby inherits some of Danny's powers and they have to figure out how to help the baby control them.
One possible plot could be that all the ghosts in the Danny Phantom world decide to be on their best behavior for the wedding. They might offer unique gifts, like a ghostly flower arrangement that never wilts. Danny and Sam would have to deal with the normal wedding jitters, but also the added stress of keeping the peace between the living and the dead guests.