A/N: Hello there! This is a crossover idea I've had for awhile now, and I hope you'll like it! There may be some TenRose in here, along with some Percabeth. Read it, review it, and be radical throughout it all! :D

Prologue

Blonde hair.

Green eyes.

That was always the first thing Rose would see in the dream.

Then, her vision would clear a bit, and she could see the girl better. And - more green. A light, springy green on the ground all around them, with red spots dotting the hills.

Grass. This was a strawberry field.

"Help me," the girl would say, barely more audible than a whisper, but Rose would hear her all the same. The girl was healthy tanned, and wearing a shimmering, strapless white dress that flowed in the non-existent breeze. Her curly blonde hair flowed across her shoulders as her deep green eyes shone with...almost fear? She had, Rose noticed, a beautiful, single ivy vine tattoo stretching from her neck to the wrist of her right arm.

"You're Rose," the ivy girl said softly. "Help me. They have her. Please, you have to help me." She couldn't've been more that sixteen or seventeen years of age, with an American accent.

"How do I help you?" Rose would ask. She didn't know this ivy girl, never seen her before in her life, but her pleads of help were genuine. "How do you know me?"

The ivy girl just lightly touched Rose's temple with two fingers. "Please help," she would practically beg. "You'll know. Bring the Doctor. Please."

And then the ivy girl would fade away, her words echoing through the silence of grey mist until Rose would wake with a jolt in her bedroom aboard the TARDIS, heart pounding and mind spinning in confusion at what she'd just seen.

Two weeks. Rose had seen the ivy girl every night for two weeks.

And did she tell the Doctor about these dreams?

No, she did not.

Rose had a bad feeling about telling the Doctor, but she didn't know why.

So she went about her business, trying not to think about the strange ivy girl who'd pleaded for help.

Just a weird bloody dream, right?

Disclaimer: Doctor Who? I don't own it, man. Percy Jackson? I don't own it, man. A strange ivy-covered girl who plauges Rose Tyler's dreams? I do own THAT, unfortunately.

Be sure to review and tell me what you think! If you like it so far, review! If you hated it, review! If it completely confused you (I wouldn't be too surprised if it did), review! :D

Love and hugs and sonic screwdrivers to you all!