Captain Marcus Weatherford arrives in Russia on a secret mission with a ballerina posing as his fiancée, but his sense of duty battles his desire to return home to Clare. Clare Danner fears losing her daughter to the father's heartless family, but only Marcus can provide the proof to save her. Can she trust Marcus, or will he shatter her world yet again?

After a deadly explosion at the Chilwell factory, munitions worker Rosalind Graham leaves the painful life she's dreamt of escaping by assuming the identity of her deceased friend. When RAF Captain Alex Baird is ordered to surveil her for suspected sabotage, the danger of her deception intensifies. Will Rose's daring bid for freedom be her greatest undoing?

In spring 1918, British Lieutenant Colin Mabry receives an urgent message from a woman he once loved but thought dead. Feeling the need to redeem himself, he travels to France—only to find the woman's half-sister, Johanna, who believes her sister is alive and the prisoner of a German spy. As they seek answers across Europe, danger lies at every turn.