Zoey's Balloon

Zoey and her friends must write a secret and tie it to a balloon for psychology class. However, Zoey's balloon gets stuck in a tree, and someone finds and learns Zoey's secret. The mysterious person begins blackmailing her, forcing Zoey to do various cruel tasks. It turns out that the person who was blackmailing Zoey was Rebecca (Daniella Monet), Chase's ex girlfriend wanting to get revenge on Zoey for Chase dumping her.