Following a romantic shipboard marriage, Joanna Morcant has a dashing new husband and an adorable baby son, but an unforseen tragedy leaves her destitute and with no choice but to return to her childhood home, the Isle of Portland off the Dorset coast. Just as she is beginning to make a new life for herself and her young son Toby, his grandfather, the dissolute Lord Durrington, vows to take the child and make him his heir. Joanna prays for a knight in shining armour to ride to her rescue - but that knight will be someone she least expects...