When three-year-old Olivia disappears, her mother Maggie refuses to leave the cottage, staring out at the turbulent sea and praying it didn't claim her daughter's life. Another mother watches proudly as her daughter starts school. Jennifer has loved Hailey for five years, but the child is suddenly moody, and there's a niggling worry that Jennifer cannot shake off. Time is running out for Maggie, and also for Jennifer and Hailey. No one can underestimate a mother's love for her child, and no one can predict the lengths one will go to, to protect her family.