The Suicide Forecast (2011)

A former professional baseball player, Byeong-wu, made a successful career transition into a high-flying insurance advisor, thanks to his keen business sense and quick wits. But one day, one of his clients committed suicide and passed away and once hero Byeong-wu is now subject to internal investigation. Now he starts to run through his client list and finds a suspicious group of people introduced to him by the same person - and starts visiting them one by one.