During their summer break, middle-schoolers Felix, Net, and Nika - brilliant inventor, computer whiz, and psychic, respectively - along with Manfred, Net’s AI companion, accidentally activate a time-travel device and are swept into perilous eras of the past and future.

Nika Mickiewicz
Net Bielecki
Felix Polon
Fisherman
Manfred (voice)
Felix's Father
Brenner
Young German Soldier
Weber
Professor Butler
'Ekierka' / Pole