Four siblings Deniz, Derya, Ali and Yaz, who think they've woken up to an ordinary school morning, learn that their parents are actually secret agents. Their parents have been kidnapped by evil forces. With the help of the supercomputer TA-OZ 4000, hidden in their home, the four siblings embark on an adventure to save both their parents and the future of the Earth. On this challenging journey, they will become a true sibling team.

Ilyas Bazna works as a butler in the British Embassy in Turkey during WW2. After Bazna starts to work as a German spy he is going to experience a series of unexpected events.