I think I'm onto something with this new business idea
The detective believes he's onto the killer's motive
She was onto their secret plan to surprise him
Are you onto the latest developments in that scandal?
We're onto the fact that he's been lying
He's onto the trick and won't fall for it again
The team is onto a winning streak
She's onto the solution to the difficult puzzle
The teacher realized the students were onto their little game
We are onto the next chapter of our adventure
I think the detective might be onto something.
Really? What makes you say that?
He asked some very specific questions.
The detective might be onto the suspect's secret plan
The detective might be close to uncovering the suspect's plan
The detective suspects the suspect's secret plan