Plot: TIN-SUNG's wife CHOI-YIN, an obstetrics and gynaecology doctor, didn't realize it's a special day for them until she calls her husband and daughter during her breaktime. At midnight, TIN-SUNG thinks of that fire broke out in 2009, whereas CHOR-KIN, after discovering that YAT-HEI doesn't take their anniversary seriously, also recalls the day when she came across TIN-SUNG four years ago