It's a busy, busy bus en route from Spain to Copenhagen. Cliff Mallow, All American Artist doesn't know why he is being accosted in his room, bopped on the head, thrown into the river, etc. (A ?real? Van Gogh is concealed within one of his paintings.) His pursuers don't realize that their attempts at a heist are being thwarted by another henchman who wants to ensure the painting's safe arrival. And none of them are aware that a heroin smuggler is on deck being watched by the pretty tour guide who is an agent in disguise. It's all standard unbelievable but the action clips along about 70 per.