In order to carry out his altruistic act Sully must first get himself fit and healthy - a fairly major challenge for someone who has some firmly entrenched junk food and excess alcohol consumption habits. But to the surprise of all who know him Sullivan sticks to his plan and starts transforming his life, even to the point of taking a job that nobody else wants - asbestos removal.
You can't help but like Sullivan as he bumbles his way towards another suicide attempt. Despite all his flaws he has a heart and slowly rediscovers just how to care for others beyond himself. I thought the friendship between Sully and Louis was touching, illustrating the easy way kids accept people at face value without the filters adults impose on one another.
There is plenty of black humour in this endearing story but ultimately it is a story of hope and positivity showing that humans are capable of growth and change at any time of their life no matter how broken they believe themselves to be.