Answer and Explanation:
At the beginning of Act 5, Scene 2, Guildenstern and Rosencrantz unknowingly walked into the arms of death: Hamlet evaded a plan that was designed to have him murdered; a sealed letter that was carried by Guildenstern and Rosencrantz and called for the execution of Hamlet, was replaced by another letter that called for the execution of the bearers of the letter—Guildenstern and Rosencrantz. The didn't know that they were doomed; eventually, they died.