Blake & Mortimer - Volume 22 - Professor Sato's Three Formulae (Part 1)

One evening in Tokyo, air traffic controllers detect an unknown flying object
and send two aircraft to intercept and identify it. However, the fighters’
last message before they crash into each other is ‘ryu’ – dragon! The whole
business has deeply upset Professor Sato Akira, and he calls upon his friend
Mortimer, who can always be counted upon for good advice. But before he’s even
received the invitation, Mortimer is already targeted by men hell bent on
getting rid of him…