Antonio and Nikola are inseparable friends who live across the street from each other and share a love for pyrotechnics and cell phones. Their families have been feuding for years because of what seems to be an easily solvable problem: water flowing from the upper to the lower house. The friendship of two boys on the threshold of puberty will be put to the test during the Christmas holidays when much more dangerous secrets and interests are revealed between the two families, and the hatred of the elders is being transferred to the children via the water. The film got its name from a local mineral that, in contact with water, releases a flammable gas that gives a powerful detonation when combined with flame.