June 1942 Grace Sinclair never meant to sign up to the ATS, but when her parents made it clear she had to marry a man she hated, Grace ran away to the safety of the army. But with her cut-glass accent and upper-class ways, Grace finds it hard to fit in with the other girls and begins to think she has made a terrible mistake... Things get worse for Grace when she meets dashing Squadron Leader Chris Holloway who shares sad and shocking news about Grace's brother. Heartbroken, Grace confides in fellow ATS girl Ruth who offers her a shoulder to cry on. With the war raging on, Grace knows she can't wallow and must do her duty. And with Ruth's new friendship and Squadron Leader Holloway's support too, maybe there is hope on the horizon for Grace after all.