Dear Diary, I Died(2016)

Overview:

When Rebbeca' sister Diana returns home after being away for a while things seem odd. Diana's desperately trying to hide secrets from her sister. Rebbeca takes the detective approach to work out what's going on only to find Diana Is in serious trouble. Before Rebecca could get the truth from her sister, Diana commits suicide. Being convinced her death was more than just suicide, Rebecca searches deeper for answers in effect putting her life at risk.