A man abducts Julia, and Lucio tracks them by following the chalk marks Julia is leaving. As he tracks them, Lucio takes the buttons off of his coat and leaves them for his father to follow. He goes down a street and sees a chalk mark. Again, he leaves a button, but this time he goes back from where he had just come, retracing his steps instead of proceeding forward. Logic states that the man kidnapping Julia would go forward to his lair and not to retrace his footsteps. Yet this is what Lucio does as he "follows" the kidnapper.