What is life?

On the night before Christmas, a girl is unable to sleep.

Of course, she isn't able to sleep most nights anyways, but that isn't the point.

As she browses through the Internet late in the night, with the house near dead silent, she hears strange muttering from upstairs.

Her family sleeps like rocks. They'd never come downstairs during the night. Never.

Mustering up her courage, she ventures upstairs to face the intruder. She has a purple belt for a reason.

What she finds... isn't what she expected.