Since childhood, Jill Marchmont lived with her parents in a house on the coast of the ocean. The mother died early, the upbringing and education of the girl was dealt with by her father, a well-known biologist. On the day of his father's death, Jill gave herself a word to continue his research related to the study of marine and coastal fauna. However, the task was more difficult than she imagined, without the help of her father, many questions remained unanswered. And it was even more difficult to get used to loneliness, a sense of detachment from the whole world. Jill’s loneliness ended when she had to shelter in her cottage a stranger injured during a storm.