Invisible hero

Sinstagram is a social network platform where you can write down your sins in everyday life and post it.The post turns blue on Tuesdays,and you get a discount coupon to buy anything from a site called Dip.You can mainly buy five things a rope,a knife,a bottle of unknown chemical X, a bottle of fake blood and a cape.
When Wack Paul and his brother Slogan Paul came across this site they found it very interesting.They decided to put a challenge video on their See-tube channel.But something goes wrong....

A man disappeared 40 years ago,and due to some reason his story has a connection with the Paul brothers.Who is this man?Is he trying to help?Or is he trying to kill them?To know more you have to read this story...