In 1390 a dangerous conspiracy was gotten up with the view to assassinating Gen. Yi, but it was discovered in time and many men were killed in consequence and many more were put to the torture. Yi Săk and Cho Min-su were in some way implicated in this attempt though they were in banishment. It was advised to put them to death but after torture they were sent back to prison. The emperor in some way had the impression that Gen. Yi was persecuting these two men because they had prevented his invasion of China. Cho was executed but when the executioner approached the cell of Yi Săk, so the records say, a terrific clap of thunder was heard and a flood of water swept away part of the town in which he was imprisoned. For this reason the king dared not kill him but granted him freedom instead. Under the supervision of Gen. Yi a war-office was established and a system of conscription which secured a rotation of military duty. The king, true to the instincts of his family, was a strong adherent of Buddhism and now proceeded to take a monk as his teacher. The whole official class decided that this must not be, and the monk was forthwith expelled from the palace. In spite of the suffering it entailed upon the people the king decided to move the capital again to Han-yang and it was done, but no sooner was the court transferred to that place than the king, with characteristic Wang fickleness, went back to Song-do. The law was promulgated that women must not go to visit Buddhist monasteries. This was without doubt because the looseness of the morals of the inmates rendered it unsafe for respectable women to go to them. The people throughout the land looked to Gen. Yi as their protector and it was the almost universal wish that he should become king. His friends tried to bring this about but they were always thwarted by the aged Chöng Mong-ju, the only great man who now clung to the expiring dynasty. He was a man of perfect integrity and was held in much esteem by Gen. Yi himself though they differed in politics. Chong Mong-ju really believed it necessary for the preservation of the state that Gen. Yi be put out of the way and he was always seeking means for accomplishing this end.