AN: Alright, here it is... my longest ever fanfic! I spent a LONG time writing this (mostly because it was bursts of writing interspersed with my many other hobbies). Since I didn't want to leave this story hanging in a weird place, I finished Year 1 before posting. In the interest of honesty, I feel I ought to warn you, I basically followed the plot for the first book. You get what you see, Donna in the wizarding world, but don't expect any shocking plot twists. If that's not your cup of tea, that's fine, I just want to warn you up front so you don't get to the end of the story and feel cheated.
That being said, some remarks.
1) I do not own the rights to either the wizarding world (JKR) or the whoniverse (BBC), and I don't make any money from this. I just play in their sandboxes a little. This is valid for the whole story, I'm not going to repeat myself for every chapter

2) The story has been beta'ed by the lovely L. (I don't feel comfortable giving out names and she hasn't told me her username yet)

3) I started this story with a particular scene in mind, I will let you know when we get to it. It went from one scene to this 28 chapter monstrosity, so... yay?

4) If you ever feel that there is a pop culture reference that Donna should make, let me know. If I feel she might know it, it might just end up in there somewhere. No promises though. At the moment I'm kind of limited by my own pop culture references, which are less extensive than some people I know, but I did my best

5) This story is not set in the same universe as my other crossovers. I will admit I was quite tempted to have Donna meet the Harry raised by the Doctor from my Madman with a Box series, but that is material for another story.

And so, without further ado... enjoy!
(Don't worry, not all author notes will be this long :D)

***DNMCY1***

The old woman prowled around the house. Her once ginger hair had turned white with age a long time ago, and was pulled into a neat bun. The hour was growing late, but she was having trouble settling. There was a heavy feeling in the air, like there was something just around the corner, just waiting to happen.

So, instead of getting into bed for the night, she was wandering around and reminiscing, touching this or that knick-knack that she'd gathered in the course of a long life. She had lived life to the fullest, she was glad to say. She'd tried to experience as much as possible, she'd travelled – not just the touristy kind with a camera and a list of tourist traps to visit, but trying to immerse herself into a culture. Any injustice she saw, she'd tried to help any way she could. At first she'd been alone, later on she'd travelled together with her husband and children.

She wasn't quite sure where her way of life came from. Not from her mum, that was certain. In part, perhaps, from her gramps, but even he – despite his dreams of the stars – had stayed much closer to home. She had a vague idea that there was someone missing, and if she could just remember... it was a familiar feeling. She'd lived with it for... oh, perhaps not quite as long as she could remember, but certainly longer than she wanted to admit. Whenever she tried to figure it out, find that elusive blue memory in the back of her mind, she would develop a sudden headache and an intense need to go do something else, preferably something active and not at all introspective.

She'd always had the feeling that her granddad, and even her mother to a lesser extent, had known more about the whole thing than they'd admitted out loud. She hadn't thought of that sort-of memory, or that feeling that there ought to be a memory, in a long time. Gramps had convinced her, many years ago, to just leave it be, and she had. She'd had other things to think about by that time.

Eventually her feet brought her to the kitchen, where they had spent so much time, especially in their later years, when travelling had not been quite as evident as it once had been.

She sat in her own lazy chair, watching his with a sad smile on her face. It had stood empty for so long. Too long.

The woman sighed, and settled her head against the headrest, closing her eyes. She had the vague idea that she would regret it tomorrow if she fell asleep here, but she couldn't bring herself to move. It felt right, sitting here.

That was the moment it all went to hell.

She would swear later, when she'd processed the whole thing, that she actually felt the start of it. The storm that had been approaching washed over her with a tingling sensation. When she opened her eyes and looked at her hand, it was glowing with a golden light, and she just knew if she looked in a mirror right now, that same colour would be shining from every bit of exposed skin. A moment later, she didn't know anything anymore as the golden light engulfed her.

When she opened her eyes again, she was standing on a sun-drenched street, which was odd in so many ways she wasn't even going to try and name them all. She was wearing the same clothes as before – slightly problematic, that, because they were threatening to fall off her shoulders. In fact, they felt several sizes too big. And the reason for that feeling, she saw when she risked a glance down, was that she had the body of a child. Nine years old, she estimated, ten at the maximum.

A nearby street sign provided the answer to one of her more urgent questions. Next to the name of the street there was a coat of arms, and right above that, three words: City of...

She was in Cardiff?

Putting her hands on her hips, she said to nobody in particular: "Well, this is just wizard!"