Tintin, a reporter for Le Petit Vingtieme, and his dog Snowy are sent on assignment to the Soviet Union. Departing from Brussels, his train is blown up en route to Moscow by an agent of the Soviet secret police, the OGPU. Tintin survives and is blamed by the authorities in Berlin for the "accident". He is put in jail and even taken to a torture chamber, but escapes (here and in later imprisonments, which are common) by deceit and disguise. He then steals a car and goes through several adventures before eventually reaching Moscow. Finally returning to Belgium, he is greeted with great pomp by the rapturous public, arriving to a tremendous reception in the Grand Place in Brussels.