When the time of the ball came, Don John tricked Claudio and told him that Don Pedro is actually trying to take Hero for himself and to marry, causing Claudio to run out, upset.
Don Pedro comes back and reveals that the plan went very well. Leona-to and Claudio then agree that the marriage will happen next week.
Don Pedro and the others also came up with a plan to trick Beatrice and Benedick into loving each other. later on, Benedick was eaversdropping to their conversation.They then proceeded to talk about the love Beatrice has for Benedick, purposely loud. After this, Benedick started to treat Beatrice a lot kinder. Hero, Margarent and unsula did the same to Beatric, producing the same results.
DOn John's plan to ruin claudio's marriage was to ''reveal'' how unfaithful Hero was. Don John goes up to Don Pedro and Claudio and tells them that Hero has a secret lover. He gives them proof by bringing them to Hero's window and tricking them.