Trapped by Rebecca York

Cash Baker wakes up in a secret military bunker, drugged, with vague images of a mission gone horribly wrong. Which of his memories are true and which are fake? There’s no one he can trust in his nightmare world until the woman he never forgot risks everything to save him.
Psychologist Sophia Rhodes never got over the bad boy who stole her good-girl heart a decade ago. Now she knows Cash is in terrible danger. But without military training, how can she possibly spring Cash from a high-security facility? Sophia discovers that breaking in and rescuing Cash is easier than dealing with his damaged memories, as desperate men try to make sure he never tells her what he knows.