Love, duty and courage during the Spanish Civil War. It's summer 1937: a tragedy sends Anglo-Spanish Maggie Morán from the comfort of suburban Stanmore to battle-scarred Madrid to search for her headstrong twin brother, Robert, who has run off to join the International Brigade. On reaching Spain, Maggie faces undreamt of danger and her world is turned upside down when she finds herself protecting a group of orphaned children. When romance enters the equation, Maggie's emotions are thrown into further turmoil. Meanwhile, Robert, passionate in his support of the Republican cause, has become inured to cruelty and death. A ruthless partisan, he is scornful of his earlier sheltered existence in England. What will his reaction be when Maggie eventually catches up with him? Will sibling loyalty soften his attitude or will his sister have to accept that, while she chooses their English heritage, her brother rejects it for the Hispanic side of their family?