your voice was the soundtrack of my summer

At the age of 17, Martin met a girl named Sia. As beautiful as her name sounds she was the most beautiful human being inside out that Martin ever met. They gradually developed a bond that felt like it could never break. But a single mistake led to their departure that remained the deed that they regretted their whole life.
But as people say that when two souls are meant for eachother, they eventually find one another.
So will they find eachother?! Will they have a happy ending 'together' ?!