Dark Waters

After the death of her father in London, Elizabeth learns that she was born in a remote island where her father financially supports a monastery. He also advises her to never go to the island, but Elizabeth decides to travel to visit the monastery to learn why she should continue to finance the place. She travels from London by bus, and has difficulties to cross from the continent to the island. She is welcomed by the sister Sarah first and then by the blind Mother Superior and the Mother Superior's Assistant and learns that her friend Theresa has traveled back to London. When she finds that Theresa was murdered in the monastery, she unsuccessfully tries to return to the continent but is trapped in the island. Meanwhile she discloses dark secrets about her past, the island, Sarah and the monastery.