Spain, 1639. When Len de Montemayor's family is killed, she thinks her life is over until an aristocratic family rescues her. Len finds a soul mate in their son, Piers, and as they grow up together, their friendship becomes a love so intense that it comes with a promise: it will last forever. But with the outbreak of civil war, a dutiful Piers knows his fate is with the Royal Navy, leaving Len waving from the shore as he sails toward an uncertain future.

Piers finds himself in the throes of battle, but unlike his shipmates, he is allied to no cause but the sea. As war rages on, he eventually returns to find his home a burned shell of its former glory, his family slaughtered, and every trace of Len gone. Thinking that she died in the fire that killed his family, Piers is heartbroken and escapes to a life of privateering on the same vast ocean that divided them.

A stirring adventure of high-seas piracy, betrayal, and war, Open Sea is, above all, an epic novel of true love.