Danny (John Travolta)’s Timeline and Summary

Danny and Sandy have a summer fling on the beach.
At school, Danny sings that his summer fling don't mean a thing.
He's shocked to learn that Sandy has transferred to Rydell for senior year.
Determined to be macho, Danny acts like he doesn't know her, hurting her feelings.
But Danny gets jealous when he sees Sandy sharing a malt with a hunky football player.
Danny goes out for track to impress her. It works.
The two date, but Sandy gets jealous when Danny won't admit to a previous relationship with Cha Cha.
After graduation, Danny is shocked—even more this time—by Sandy's sexy new makeover.
He declares that Sandy is the one he wants, and they fly away in his magic car.
For real.