Debt unpaid

Some debts can't be wiped away so easily. A monetary debt can be paid off in time, but a life debt will never truly be repaid. A super soldier, torn from the losing end of a suicidal battle for survival, And a girl, trapped in a tower her entire life. How can a soldier with nothing, repay a woman who yearns for freedom? "Don't make a girl a promise, if you know you can't keep it."