How could I find the Plan command?

I tried finger and find a Plan $ finger $USER Login: me Name: me Directory: /Users/me Shell: /usr/local/bin/bash On since Tue Nov 13 07:33 (CST) on console, idle 1 day 9:44 (messages off) On since Tue Nov 13 07:33 (CST) on ttys001 No Mail. No Plan. at the ending, there are No Mail and No Plan I know that Mail in /var/mail and there's a command `$ which mail /usr/bin/mail` How about Plan, where could I find it.