- [Narrator] The vole's search for a new home has taken her three miles into the glen.

(birds chirping) (water lapping) Ahead of her lies water.

(water lapping) She spent her entire life around streams.

But with poor eyesight, she has misjudged how far it is to the other side.

(wind whooshing) (birds cawing) This loch is vast.

In the cold waters beneath her, monsters lurk.

Giant pike, four times her size, could swallow her whole if she doesn't drown first.

She's never swum more than a few feet from land before.

The farther she swims from shore, the more likely she will be detected.

Once a pike senses ripples, most prey don't stand a chance.

(birds chirping) But this water vole has made it to the other side.

(water lapping) For now, she's safe.