It had happened before.

Burnt Mountain, Alaska.

Novosibirsk, Siberia.

Now it is about to happen to a thriving city.

A city with a population of 1.3 million people,

all of whom will be wiped out in a blink.

Unless it can be stopped.

Teenagers Tane Williams and Rebecca Richards hold the key to stop the destruction.

A message from the future.

Instructions that cannot be ignored.

Tane and Rebecca must act - and fast.

The survival of the human race depends on it.