The Seven Deadly Sins used to be a group of knights in Britannia’s region, that dissolved after supposedly conspiring against The Kingdom of Liones. Despite their alleged defeat against the Holy Knights, rumors persisted saying they were still alive. Ten years later, the Holy Knights organized a coup and kidnaped the King, therefore becoming the new tyrant of the kingdom. The third princess, Elizabeth, decided to travel to find the Seven Deadly Sins and get their help to take back the Kingdom from the hands of tyrant.