Nazi spy falls in love with her Allied Target and has 48 hours to rescue him before her sadistic team executes a plot that threatens them both.

Why would a spy focus ?time and energy targeting a mere grunt, a soldier? ?What information or access to military intelligence does he have that the Nazis want? ?What makes him such a valuable target?

Why would a spy focus ?time and energy targeting a mere grunt, a soldier? ?What information or access to military intelligence does he have that the Nazis want? ?What makes him such a valuable target?

Your explanation seems to lack an inciting incident - you said - "?if she does not make the decision to betray her family of spies?".
The event that motivates her to betray her family of spies is the inciting incident, and needs to causally connect with her goal - to save the soldier.

Secondly describing the stakes as "...a plot that threatens them both?" is too vague, best you describe the danger in detail - execution, made into medical examination subjects?or put in a death camp what ever they are clearer stakes are better.