Three sisters (doctor Piret, interior designer Mari and psychologist Kertu) discover that they have one more sister. Shocking news challenges family relationships and forces them to ask why their mother has hidden her first child's existence. When the fourth sister decides to come and visit her mother and sisters in Haapsalu, events that nobody could expect started happening. Is blood thicker than water and the stranger becomes theirs?
| Actor | Role |
|---|---|
 Inga LungePiret | Piret |
 Elisabet ReinsaluMari | Mari |
 Liis HaabKertu | Kertu |
 Karin TammaruIris | Iris |
 Rita RätseppSirje | Sirje |
 Ain LutseppAlbert | Albert |
 Indrek SammulErik | Erik |
 Vladas RadvilavičiusIndrek | Indrek |
 Jekaterina KordasNurse | Nurse |
| LLaura KohavaMammu | Mammu |
| HHeleri-Anete NeiderLiisa | Liisa |
 Guido KangurPsychologist | Psychologist |
| TTiiu VallimaaReet | Reet |
 Merle PalmisteSiiri | Siiri |
 Hilje MurelViivi | Viivi |
| KKrista LensinLuisa | Luisa |
| MMaretta VainumäeKertu's Client | Kertu's Client |
| KKetlin TiidoPiret's Patient | Piret's Patient |
 Fatme Helge LeevaldPiret's Patient | Piret's Patient |
| AAya KokkMake-up Artist | Make-up Artist |
| RRaivo TeeäärStudio Director | Studio Director |
| JJaanus NoormetsStudio Director | Studio Director |
 Jaan ElgulaBand | Band |
| TTiit KevadBand | Band |
| TToomas LungeBand | Band |
| VViktor VassiljevBand | Band |
 Tiit KikasBand | Band |
| AAndres KuutBand | Band |