Upvote:1
Your only solution for traveling with no specific plans is as follows:
1) Apply for your first single-entry Schengen visa with an exact itinerary
2) When the first visa expires, apply for a second multi-entry visa with an exact itinerary
3) Once you've traveled once on your multi-entry visa following the itinerary submitted to the embassy, it's perfectly legal to enter the Schengen area at any airport without having an exact plan until the last minute.