Roma plans to perform at a school competition and show a huge starship assembled from a construction set. The toy, equipped with the latest technology, immediately attracts the attention of uninvited guests - mysterious space pirates. They are trying to steal the starship. Roma's friends - Pinky, Bublik, General De Krol, Fly, Gloria, Ko-Ko and the ninja lizard O-Rush - will have to fight the aliens, and also test the strength of friendship, reflect on mutual assistance, courage, bravery, the right to make a mistake in everyone's life, and also the ability to forgive.
Three schoolchildren accidentally find a magical portal in the Holy Trinity St. Sergius Lavra and are carried away into the past. Now their goal is to return home, and for this they need to go through the wonderful forest of the XIV century during the Tatar-Mongol yoke and the Battle of Kulikovo. St. Sergius of Radonezh will help the teenagers.