Planında olmak istiyorum.
- I want to be in your plan.
O anda Boston'da olmak müthiş heyecan vericiydi.
- It was tremendously exciting to be in Boston at that time.
See here what it says in Wiktionary. So, you were in the wrong about the meaning of that word.
... That doesn't mean it's wrong. ...
... YOU KNOW WHAT, ARTHUR? MAYBE I HAD YOU WRONG. ...