Oscar loves computer games and coding , but when his mum drags him around a draughty castle he might be in for the adventure of his life. After finding a secret door, Oscar steps back in time to medieval times and soon finds himself in the middle of a plot to kill the king. Can Oscar use his codebre...

Oscar loves computer games and coding , but when his mum drags him around a draughty castle he might be in for the adventure of his life. After finding a secret door, Oscar steps back in time to medieval times and soon finds himself in the middle of a plot to kill the king. Can Oscar use his codebreaking skills to stop the plot and return home?