A movie is about two children, a boy and a girl who can't see the sun. There are ghosts in the villa where they live.

I think it's Nicole Kidman's Cry of the Island.

After World War II, on an isolated island, Grace (Nicole Kidman) raised two children, Anne and Nicholas, alone, waiting for her husband to return from the battlefield. Because the two children are seriously allergic to the sun, they can't accept the sun and have to stay indoors. So Grace drew all the curtains in the big apartment where they lived. One day, the servant left without saying goodbye, so Grace had to hire three more servants. They are Mrs. Miller, the nanny, Mr. Teto, the gardener, and Linda, the mute maid. The arrival of three people seems to add a bit of life to the house. But a series of strange things began to happen. The door will automatically close and the piano will automatically ring. Ann even said that she saw a strange little boy named Victor in the house. Lace gradually felt that the house was surrounded by a strange and mysterious atmosphere, and she fell into anxiety. Everything became confusing. Is there really anyone else in the room besides them? Those three servants seem elusive. What's their purpose? In fact, Grace is an eccentric woman, and she is a little hysterical in this environment. The nightmare began. Grace and her children seem to face supernatural forces ... but in fact, before the servants left, Grace had suffocated her two children with pillows because of mental stress and committed suicide, so the servants all left, but Grace didn't know that she and her children were dead. In fact, only their ghosts were left in the old house, and the hostess of the old house became an "uninvited guest" she didn't know at that time. When two children went to find their father at night, they found the graves of three servants. Suddenly, they found that none of the three servants were alive. They went back to the house in panic, and the three servants explained everything to them. It happened that this middle-of-the-road family, in order to find out what the ghost in the house was, found a psychic to let Grace know that she and her children were dead. At the same time, the hostess in the middle of nowhere moved away because she couldn't stand it. Grace is determined to live here all the time and not let anyone invade her.