Lullaby

A man of 50; Minajel is having sleepless nights since he
cannot remember the tune of a lullaby his mother used to sing
him to sleep . He is insomniac and visits the doctor for
help,who advices him to sort it out himself. He searches
everywhere for the casette which has the lullaby recorded but
fails to find it. One fine day his sister visits him after
several calls from him and he interrogates her about the
casette. He loses him temper after realising she was the one
for whom his mother died and the reason why the lullaby is no
more ; in a heat of the moment he kills her only to realise
later that the casette was unharmed by her and she was
innocent indeed!