When is it okay to use in on one after the other in the same sentence? [closed]
I'm watching the Netflix docuseries "Evil Genius: the True Story of ..." and in it, the following sentence has come up two times.
... Brian was actually in on the heist.
The first few words of the sentences are different but the last ones are the same. Why are the prepositions in & on used consecutively here? Isn't using in enough to convey the meaning? I looked for an explanation on the web but couldn't find anything helpful. An explanation with some more examples would be very much appreciated. Thank you.
After @Robusto's suggestion, I looked it up in the dictionary and found the meaning.
in on (Adjective): Part of or privy to (something private, especially a plan or plot).
Examples:
- She was in on the surprise from the beginning.
- We had to let him in on it after he overheard some of us talking.