The assassin's triangle

In this world the government pays people to kill dangerous people. The world is ruled by one person named Mr. Johnson. The time period is 2050 and they have very advanced technology. Sadly, Henry was born into the assassin program and was trained to be a killer, he doesn't know what emotions are and doesn't care about them. His target Alex is 24 and is the most famous mafia leader's, he son and is the heir to the legendary Carlson mafia. Henry is a 25 year old 5'7 with black hair and ice blue eyes. Alex is 5'6 with dirty blonde hair and brown eyes. Nobody knows what Mr. Johnson looks like, except that he wears a two piece mask, is 6'2, 27 years old, has brown hair, but most importantly he does have a fascination with Henry.