A different Story

Few years back three foreigners stay together in London and they become buddies. But one incident happens and they decide never to see each others face for a life time.
The Paris blasts happens and suspect photos are released. The two guys approach police. Who is he? Why is he a suspect?
Guys decide to travel across Europe to search him. They have to undergo multiple incidents and each and every incident change their mindset.
Can they find their missing friend? Was he responsible?
Will they come together again? Or they are already polarised by brexit?