Tyneside 1890. A school outing to Cullercoats Bay almost ends in tragedy when two girls are cut off from the incoming tide.

But from the panic and confusion something wonderful emerges - a lifelong friendship between three girls: Ruth, Lucy and Esther.

Each is a world apart from the other two, but together they form a strong and unbreakable bond that will see them through the years ahead when the happy carefree days of childhood are nothing but a distant memory. . .