Bittersweet is about a child named Zya, who has divorced parents. She stays under her father's custody and her father does not allow her to meet her mother after the separation. She misses her mother so much, till one day, on her 8th birthday, she tricks her mother to come over and meet her at the school's report card day without her father's knowledge. Since then, she keeps finding ways to make her mother stays longer with her. As the time passes, she finds out the truth that changes her. Will she choose to stay with her mother or return to her father?