"Unlimited" is largely based on the idea of the film of the same name. You play a male character who was kicked out of his home at a young age and has been barely coping with life ever since. This went on until one day, when a stranger came up to you to look after some goods, your world turned upside down. All thanks to the magic pill.
You will meet many different people along the way, improving your life and hopefully getting back in touch and relationships with those you left behind, as well as some others along the way. How close a relationship you build with each person you meet will depend solely on your choices and preferences.