One day, Zeus tore into the woods, looking for a place to hide. His wife, Hera, was after him again. Would he never learn to stop flirting with the nymphs who lived deep in the woods? Apparently not. Spotting Echo, he asked her to help him escape the eagle eye of his wife. One did not turn down a request from Zeus, not and live to tell about it.
When Hera tore into the woods after Zeus, Echo sidetracked her with chatter and gossip. For some time, this worked well for Zeus.
When Hera figured out what was going on, she punished Echo by denying her much of her beautiful voice. All Echo could do forever after was repeat the last few sounds she heard.