Review of Play Daughter's Punishment

The girl's beloved father died, with whom they lived together for a long time, and after a while her mother found a new husband. One day our heroine stole from her mother's pocket the key to the room, which under unknown what, converted the stepfather. Parents strictly forbade the girl to ask what is behind the door, so she took the key from her mother when she was going to go to work in the morning.