in (one's/someone's) tracks
1. Of one's own tracks, in the location one occupies at a given moment in time. We were all frozen in our tracks at the sight of the mountain lion. It looks like the reigning champions have been stopped in their tracks in this year's tournament.
2. Of someone else's tracks, according to that person's guidance, example, or experience, as through life; in someone's role or occupation. I hope my son decides to follow in my tracks and become a doctor. The new government has decided to lead the country in the previous administration's tracks.