The Seven Deadly Sins, a group of 'evil knights' who conspired to overthrow the Kingdom Of Britannia, were said to have been eradicated by the Holy Knights, although some claims that they are still alive. Ten years later, the Holy Knights have become the new tyrannical rulers of the kingdom. (Y/n) and Elizabeth, the kings' daughters sets out with on a journey to find The Seven Deadly Sins and to enlist their help in taking back the kingdom. They faces many setbacks and challenge along the way that strengthen their bond with each of The Seven Deadly Sins' member.