Camp Whovian

The eleventh doctor, along with his companion Clara Oswald, are on their way to the premiere of a 2069 Hollywood premiere movie. But instead of getting there, they crash land.

At Camp Half-Blood.

The war with Gaea and the Romans is over. It had been for a year. All of the seven, except for Leo of course, were celebrating the anniversary of the wars' ending. Along with Nico, Reyna, Grover, Rachel, and all of their other friends.
But then things start to happen.

Rachel has a new prophecy.

The Doctor has visitors.

The demigods get a message.

And a brand new war is about to start.