on the scent

He was not so quick on the scent, it seems.

They were headed for me, probably on the scent of my transmission.

What's more, your other buddies are hot on the scent.

"I was on the same scent as you from the first."

He found himself focusing more on the scent of her.

Like a wolf on the scent, Alex turned toward the house.

She was on the scent and ran like the wind.

Then we may have a few days before they come on the scent.

"There may still be time to send him on the wrong scent."

She was a journalist on the scent of a story.