The 4 is nothing but 4 friends.
To talk about the friends, they are:~
♤Mary, a Peripatetic girl
♧Harry, a bibliophilic boy
♧Matthew,a sunset painter and
♤Aisha, a nature lover.
These 4 are always brave, together in any aspect and are ready to face any obstacle in life, which is the greatest key behind their success....
They have a diary in which they fill up with missions to complete and among the missions, the city's curse is also one.