Daughters of the Lake by Wendy Webb

After the end of her marriage, Kate Granger has retreated to her parents’ home on Lake Superior to pull herself together―only to discover the body of a murdered woman washed into the shallows. Tucked in the folds of the woman’s curiously vintage gown is an infant, as cold and at peace as its mother. No one can identify the woman. Except for Kate. She’s seen her before. In her dreams… One hundred years ago, a love story ended in tragedy, its mysteries left unsolved. It’s time for the lake to give up its secrets. As each mystery unravels, it pulls Kate deeper into the eddy of a haunting folktale that has been handed down in whispers over generations. Now, it’s Kate’s turn to listen. As the drowned woman reaches out from the grave, Kate reaches back. They must come together, if only in dreams, to right the sinister wrongs of the past.