Eager young radio reporter Teräsvuori stages a one-man burglary into the Helsinki Art Museum, recorded on tape for a later broadcast by his friend Laakso. Things go awry when a gang of real criminals overhear their plans and book their heist to coincide. Teräsvuori gets caught but escapes from police custody to start his private investigations together with female radio colleague Eila.
Wager is Count Mauritz Armborg, the young master of the estate. Linnanheimo plays Katariina (Catherine) the nanny to Mauritz's nieces and nephews. The two fall in love and decide to escape to Italy via Denmark where they have planned to get married. There are always complications because Mauritz's grandmother doesn't want him to marry below him - she has decided that Mauritz is to marry the Swedish beauty, Ingeborg Liliecrona.
