Sienna Vale thought she was finally over her childhood sweetheart, Callum Ryder, until a housing mistake forces her to become roommates with the hockey captain who broke her heart four years ago. Callum never stopped loving her, but Sienna refuses to forgive him without knowing why he walked away. As old feelings return and their attraction becomes impossible to ignore, the secrets behind their breakup begin to surface. Now Sienna must decide whether the boy who broke her heart deserves a second chance, while Callum must prove that this time, he is brave enough to choose her.