Oskar earns money by playing the accordion and singing for other people.
One day Oskar and Rasmus are singing in front of a house where a robbery is taking place.
He also believes the old woman is terribly scared and asks Oscar to find out why.
Rasmus and Oskar don't know about the allegations and sing in front of the two accomplices of the maid.
Soon, the robbers hide their stolen goods in the house where Rasmus and Oskar spend the night.
A while later Oskar and Rasmus are arrested, because the police suspects, they are the criminals who robbed the old lady.
The robbers want to free Oskar from prison so that he can not tell the police too much about them and tell them the hiding place.
At first Astrid Lindgren wrote the script for an audio play series, which was first broadcast in 1955 on Sveriges Radio.
The book titled Rasmus på luffen was first released after publication of the film.
On December 3, 1955 Rasmus, Pontus och Toker premiered in Stockholm.
The film is surprisingly timeless and still suitable for children today.