Blake & Mortimer - Volume 15 -The secret of the swordfish

In a past almost, but not entirely, like ours, the world lives in dread of a
new power, an empire centred in Tibet and led by a megalomaniac. When the
inevitable attack comes, it destroys all opposition, and capital cities across
the planet are left burning. But, in Great Britain, Professor Mortimer,
inventor of a mysterious weapon named the Swordfish, and his friend and
protector Captain Blake, have escaped the destruction, and must make their way
to a secret base...