Drowning Ghost

Drowning Ghost Swedish Strandvaskaren is a 2004 Swedish slasher film directed by Mikael Hfstrm and written by Lars Yngwe Vasa Johansson and Hfstrm. It stars Rebecka Hemse, Jesper Saln and Jenny Ulving.

A year later the student Sara, who witnessed the suicide, is attending her final year at the school. Two new students, math genius Felix and diplomat son Leo, start to study at school. Sara and her friend Therese start to tell them of the local legend, Strandvaskaren the Drowning Ghost. A century ago a farmer slaughtered three male students at the school before drowning himself in the nearby lake. He is believed to return once every year on the day of his death to haunt the school, and there is a tradition among the students to have a party at that day in the barn where the farmer once lived.Sara finds out that the farmer killed the students to avenge the rape and murder of his daughter, but it was all covered up by the authorities because the rapists were upper class. At the party, Saras former boyfriend Mns and his friend Ynge try to pull a prank on Sara, but the drunken Ynge tries to rape her. Sara pushes him away and runs away while Mns yells at Ynge for going too far. Sara runs out and finds Mns current girlfriend hanging dead in the hallway. Ynge goes to have some milk and is killed by a fork struck through his head. Mns find the hysterical Sara and tries to calm her down and apologize. ........

Source: Wikipedia