Boots: Another Difficult Puzzle Hiding in Plain Sight!

Today's Puzzle:

There is a little trick to the break-in as posted by Sujoyku, but an approachable puzzle overall!

Link to Play Along:

Boots by sujoyku http://tinyurl.com/SudokuSleuthBoots

Rules:

Normal sudoku rules apply.

Digits in a cage do not repeat and sum to the clue in the top left.