Jacky is a translator. He is a bit of an eccentric. And he can't quite understand why the enigmatic and beautiful girl at the bar wants to talk to him. Even more perplexing is the tatty-looking book she carries with her but won't let him touch. Written in an untranslatable language - even for him - it contains, quite impossibly, what seem to be photographs of her murder. When she disappears hours later and the book comes into his custody, the suspicion falls on him. Accused of her murder, Jacky must find a way to decipher the untranslatable book she has left behind. Racing through Paris in pursuit of the truth and the missing girl, he must track her down with nothing but an unwavering determination and the assistance of the world's most annoying man. The Mule is a wholly original, comical thriller filled with eccentric characters, sporadic violence and other peculiarities. Weaving a tale of intrigue, betrayal and romance, this is the bizarre story of the world's most enigmatic book.