The film was based on a novel by Elisabeth Ogilvie which was published in 1945. The novel was set in Maine. She wrote a sequel,
Storm Tide, which was published in 1947. Film rights were purchased by the Rank Organisation. The original director was Pat Jackson, who was a freelance director who had done work for Rank. Jackson called the story "very interesting, quite good".
Virginia McKenna was meant to star. Jackson saw Patrick McGoohan on stage in
Moby Dick and cast him in the film. Jackson said, "He was going to be the hero! And he would have been wonderful." The lead role went to American actor Betta St John, who had appeared in Britain on stage in
South Pacific, fell in love with an Englishman and decided to stay. According to Michael Craig, St John did not tell them she was four months pregnant and "by the time we finished shooting the picture we couldn't shoot below the shoulders. There were a lot of problems with that."
Filmink argued the movie had "a splendid lead part for a female, and it’s ironic that a few years previously, when Rank had a staggering line-up of female stars that it put in lousy roles (Kay Kendall, Diane Cilento, Diana Dors), they’d all since moved on to greener pastures; the studio offered it to Virginia McKenna who turned it down, so they went to Betta St John, who is nice and pretty but simply doesn’t have “It”." There was also location filming in Cornwall. According to Jackson, the film "cost a lot of money." ==Reception==