find in

find (one) in

To locate or discover one in a place that belongs to them, such as their home or office. I bet you'll find Susie in this weekend—she said she has to finish a big project for class on Monday.
See also: find
Farlex Dictionary of Idioms.

find someone in

to learn or discover that one is at home; to learn or discover that one is in one's office. I never expected to find you in at this time of night. Did you really expect to find me in on a Friday night?
See also: find
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • appear to
  • a change of heart
  • a mystery to (one)
  • a shoulder to cry on
  • a turn of phrase
  • able to do
  • able to do it
  • a tough cookie
  • a tough customer/cookie
  • a piece of the action
References in classic literature
It was some check upon their transport to find in this person an entire stranger, but they appealed to him, nevertheless, and besought him, in impassioned language, to restore them to their friends.
Barnaby Rudge A Tale Of The Riots Of Eighty
"How many anonymous bodies do we need to find in the orchards?" Autry asked.
Shift work: should policing illegal immigration fall to nurses and teachers?
She has refused, directing me, as Gill had, to the INS Web site where I could find INS detention standards on media visits.
Challenging the reporting limits imposed by the INS: for asking an `inappropriate' question, a reporter's access is curtailed. (INS Coverage)
The really depressing thing was that we made an active attempt to find INS supporters, people whom we believed from the outset would give us a defense of the INS.
Important questions happen before reporting begins; `once we got that question in our minds, all of a sudden everything fell into place.' (Watchdog Journalism Conference)