s ▁husband , ▁professor ▁Park ▁Jin - han . ▁Before ▁the ▁meet ▁up ▁with ▁Jin - han , ▁it ▁turned ▁out ▁that ▁Jin - han ▁had ▁had ▁a ▁secret ▁affair ▁with ▁a ▁student , ▁whom ▁he ▁r ushed ▁to ▁right ▁after ▁the ▁fun eral ▁to ▁find ▁comfort . ▁ ▁At ▁the ▁police ▁station , ▁a ▁series ▁of ▁b izar re ▁events ▁led ▁Jin - han ▁to ▁believe ▁that ▁his ▁wife ▁was ▁still ▁alive . ▁It ▁was ▁revealed ▁that ▁Jin - han , ▁a ▁long ▁time ▁ago , ▁had ▁spent ▁time ▁to ▁study ▁a ▁new ▁form ▁of ▁drug , ▁which ▁later ▁turned ▁out ▁to ▁be ▁to xic ▁to ▁the ▁body . ▁This ▁drug ▁could ▁par aly se ▁the ▁nerv ous ▁system ▁and ▁cause ▁death ▁leaving ▁no ▁evidence ▁behind . ▁Jin - han , ▁discussed ▁with ▁his ▁mist ress ▁H ye ▁- jin , ▁attempted ▁to ▁poison ▁Se ol - he e ▁so ▁they ▁could ▁be ▁together . ▁There ▁was ▁one ▁small ▁hole ▁in ▁his ▁plot , ▁to ▁which ▁Jin - han ▁trust ed ▁that ▁it ▁led ▁to ▁the ▁failure ▁of ▁the ▁plan , ▁was ▁the ▁effect ▁of ▁the ▁to xic ▁could ▁be ▁blocked ▁by ▁the ▁use ▁of ▁ill ic it ▁dru gs . ▁ ▁Af raid ▁that ▁his ▁might - st ill - be - al ive ▁wife ▁could ▁harm ▁H ye - jin , ▁Jin - han ▁sp it ▁out ▁the ▁truth ▁of ▁his ▁relationship ▁with ▁H ye - jin . ▁However , ▁more ▁and ▁more ▁evidence ▁shows ▁the ▁connection ▁of ▁Jin -