Resume : The story begins as a deadly snowfall covers Buenos Aires and the surrounding metropolitan area, wiping out most life in a few hours. Juan Salvo, along with a couple of friends (Favalli, Lucas and Polski who were playing truco at his house), his wife and daughter remain safe from the lethal snowflakes thanks to the protection of Juan Salvo's home and the cleverness of Favalli. They organize to survive the ordeal, making special suits to be able to leave the house to gather supplies. During these trips they find Pablo, a twelve year-old boy, and realize that crazed or needy survivors may be as much of a threat as the deadly snow.
One of the alien Manos ("Hands"), Italian translation
A few days into the snowfall, they learn that the phenomenon was caused by an extraterrestrial invasion to Earth. They are recruited into an improvised resistance army to fight the invaders. During this time, Salvo meets and befriends a few of his fellow soldiers, namely Franco, a lathe operator, and Mosca, a journalist. As the insurgents march towards the country's capital city, they fight on different occasions against giant insects (cascarudos, "beetles"); a humanoid species with many more fingers than humans, especially on their right hands (Manos, "Hands"); giant elephantine beasts capable of knocking buildings down ("Gurbos"); and fellow men who were captured and altered (hombres-robot, "robot-men"). All of these beings are pawns, remotely controlled through implants or fear devices by the real invaders, los Ellos ("Them"), eldritch creatures who remain hidden, controlling everything from the distance.
After managing a few victories, the resistance forces are ambushed and reduced to a few men. Juan Salvo decides to return to his wife and daughter to go into hiding with them. A passing ICBM convinces Favalli and Franco that a larger global war is starting, and that they can't return empty-handed. Salvo reluctantly agrees to join them. After the trio attacks the aliens' HQ in Buenos Aires, taking down the "anti-nukes field", they flee. Buenos Aires is leveled by a nuclear warhead.
Gradually the aliens lure the pockets of survivors throughout the country to "snow-free zones" as part of an elaborate ruse. Salvo's group splits, and he tries to escape with his wife and daughter using one of the alien spaceships. He accidentally triggers a time traveling apparatus in the craft. As a result, the three are lost in separate time dimensions known as "continuums". Juan Salvo begins to travel through time seeking them, eventually being named Eternauta, a voyager of eternity.