Colonel Barring has purchased the Maanala estate, where strange things are happening. She wants to cancel the sale and writes to Major Hector, who is acting as the owner's representative. The major sets off for the estate with the colonel, his wife, his nephew George, and George's fiancée Vappu. The colonel's son Leo also arrives, accompanied by his new love interest, Sirka. The group spends an unforgettable night in the haunted house.
Is Mikä yö! on Netflix? Unfortunately the movie Mikä yö! is not yet available on Netflix.
| Directing | Ville Salminen | Director |
| Writing | Ben Travers | Theatre Play |
| Writing | Gösta Stevens | Original Film Writer |
| Camera | Marius Raichi | Director of Photography |
| Camera | Vittorio Mantovani | Director of Photography |
| Editing | Alvar Hamberg | Editor |
| Sound | Georg Brodén | Sound |
| Sound | Harry Bergström | Original Music Composer |
| Art | Ville Salminen | Production Design |
| Production | Kurt Nylund | Producer |
| Writing | Ville Salminen | Screenplay |