Eva and Ruben are two siblings from the year 2019. After discovering an old time machine in their grandfather's laboratory, they accidentally send themselves back to the year 1957. As they try to find a way to return, Eva and Ruben initially try to stay as unnoticed as possible. Eva soon falls in love with an Italian boy named JJ , who works as a lighting technician for a popular dance show called Club 57. Eva also becomes friends with the show's lead performer, Amelia , and provokes the ire of JJ's ex-girlfriend, Vero. Not wanting to leave JJ, Eva decides to stay longer in the past. Meanwhile, Ruben starts selling his technology to his grandfather , who is in his twenties in 1957.
Eva and Ruben's presence in 1957 attracts the attention of the Guardians of Time, a group of interdimensional agents monitoring the universe's timeline. They send an apprentice guardian named Aurek and his robotic assistant Droide to catch the two siblings and stop their disruptions in the past. Eva and Ruben evade their capture and eventually return to 2019, but there they find that their actions in the past have had a butterfly effect on the present: their parents are no longer together and their grandfather is a spiteful millionaire. Eva and Ruben return to the past to undo their actions and recover their old lives.
