While four men blows up a safe a night watch is accidentally killed. They get away with the loot. Ten years later, Einar Hansson, the stepson of the dead night watch, receives a telephone call from the owner of restaurant Paradiset. Einar is to pick up an envelope at a tobacconist, containing vital information about the robbery. At the tobacconist shop, Einar runs into a young woman Eva. Eva, a wannabe crime reporter, is picking up a letter. The two letters get mixed up.