What is the main conflict in The Blue Castle: A Novel by L.M. Montgomery?

The Blue Castle is a novel by the author of Lucy M. Montgomery. The story follows the main character, Valancy Stirling, as she tries to put the pieces of her life together after finding out she only has about one year to live because she has a fatal heart condition. When Valancy, who is 29 years old and is an old maid by societal standards, finds out she is about to die, she starts living her life for the first time. She no longer cares what her mother or other family members say or think about her. Valancy vows to start living and experiencing everything she has always dreamed of having in life, including the man of the her dreams and a home of her own, which she refers to as the Blue Castle.