What is the fine-grained topic of the following text: In her latest novel, Mary Higgins Clark exposes a dark secret from a family’s past that threatens the lives of two sisters, Kate and Hannah Connelly, when the family-owned furniture firm in Long Island City, founded by their grandfather and famous for its fine reproductions of antiques, explodes into flames in the middle of the night, leveling the buildings to the ground, including the museum where priceless antiques have been on permanent display for years. Only return the topic.
A family's dark secret threatening sisters' lives amidst their family-owned furniture firm's explosion in a novel by Mary Higgins Clark.