Little Dragon Coconut is terrified: old Murk has kidnapped his friend Oscar! Both disappeared from Dragon Island. Fortunately, Oscar managed to leave a letter with important information. And this first letter leads Coconut straight to London! But before he even gets there, the big chase begins: first in Paris, then in China, and then in the land of the Indians. Oscar's letters always provide the right information. But each time they reach Coconut's hands a little late. Will the little dragon manage to free his friend? A book outside the main series, which also contains envelopes with letters that the young reader can unfold and read.