Hannah and Grace only share 25% of their lives with us. What about the rest? Find out about what hartbig is in reality in 'The Biggest Hart'

"Hey Hannah, Even though we change and we're all finding ourselves in the world, we both know that when the tears fall or the smile spreads across our face, we'll come to each other because no matter where this crazy world takes us, we will always and forever love each other. Love you, Grace."

Hannah and Grace had been through thick and thin and had ended up together anyway. But, can they stay together through everything? Meanwhile, Sarah is lonely with a big reputation and a busy schedule. Will she ever find someone?