What The Letter Said

(From Blue's Perspective) 

"The weather is kinda gloomy today, isn't it?" Evan said. 

"Yeah, I think it's gonna rain," I said. 

"We met on a rainy day as well. Anyway, let's get to the point," he said. "The paper contains a message. It is written by a dark mage using secret language. There are various types of secret languages. Some of them are hard to make, thus they are hard to read and not all of the mages can read that. It is that kind of language. I had a hard time deciphering it. But I did anyway." 

"What does it say?" Dem asked. 

"It says that 'Come near the Black Rill at twelve tomorrow night. Your husband won't be home at that time. I don't like to threaten you, but let's do it just one time, hm? If you don't come, that fruit will rot artificially'," he said. "This is what the first paragraph says. The second paragraph says- 'In case you think it's a joke and ignore it, go to the cave near Black Rill'."