La senda de las cuatro fuerzas (La puerta de los tres cerrojos 2)

The Gate of the Three Locks, the entrance to the quantum world where he experienced unforgettable and extraordinary adventures, has vanished. Niko hasn't been able to find his friends again. Until Quiona, his quantum fairy, reappears to ask for his help. The young man will discover that the laws of physics have gone haywire, and it's up to him and his friends to restore balance. In his new quantum adventure, he must face the trials of each of the forces that govern our Universe.