Gone with the Tide

Piper was as normal as a demigod could be. She had friends, a boyfriend, and a cabin full of decently nice siblings. Unfortunately, demigods don't get breaks, so Piper's life begins crumbling around her.
.........

Percy doesn't know what's going on. Everyone at camp is acting weird, save for a select few people, but especially Annabeth and Jason. He and Annabeth hadn't been on the best terms since Tartarus, and every day she still seemed a little scared of what he could do, but everything had seemed fine.

Until Piper was accused of being a traitor.

The two hadn't been the closest out of the 7, but Percy knew Piper. She would never do something like that. It was just a matter of getting her away from the problem so Chiron could deal with it without Piper or anyone else getting hurt.

.......

Malcolm Pace could safely say he had spoken about 3 sentences to Piper McLean in her entire time at camp. But even he knew something was up with his sister and the rest of camp. Piper clearly wasn't a traitor. Why couldn't the wisest and most logical person in the Athena cabin see that?

.....

Hazel Levesque hadn't gotten to live a "normal" life in a long time. Was it selfish that she was hoping that Piper would help her in that endeavor? She hoped not, considering Piper didn't have many other people to turn to these days. Hazel knew that Piper was innocent, sure as she knew Nico was her brother and her favorite color was purple. Hopefully she would be able to convince everyone else of the fact too.

......
Four demigods in one apartment building, all trying to rebuild their lives. What could go wrong?

(Well, everything.)
...........

They were here, and then suddenly, like the tide, they were gone.

Be careful, for it might just be low tide.

Or it could be a tsunami.