Valerian et Laureline (english version) - Volume 16 - Hostages of Ultralum

Valerian and Laureline take a break from adventuring and go on a cruise, but
Valerian feels uncomfortable among the idle and the powerful. He’s not bored
for long, though, because when a quartet of mercenaries board the cruise ship
to kidnap the son of the Caliph of Iksaladam, they end up taking Laureline as
well. With the almighty Caliph offering a massive reward for his son’s return,
Valerian’s quest to rescue his girl is suddenly hindered by every bounty
hunter in the galaxy…