Who are they?
Where are they?
Where are they going?
Are they related?
What does the man want? What is his goal?
What does the boy want?
What is stopping both of them from getting what they want?
Set up a time limit for them to succeed.
What will happen if the time runs out?
Write the dark moment, the point of no turning back.
Have their desires changed?
What did they learn from what happened?
Will they remain together at the end?