"Você não vai acreditar nisso."

Translation: You are not going to believe it.

[137rsa]

don't understand why you will believe this is a correct solution and what is the differece between "will not" and "are not able to"

[RobertoLuizzz]

I give reason 137rsa.

[nefnefnef]

what is the difference between nisso and esse?

[Mallowigi]

nisso = em + isso = in this/that

Believe (acreditar) always need a "em" (in) afterwards, so all the "em" forms are needed. If there was a noun after, then it would be "nesse" instead

"Voce nao vai acreditar nesse filme"

[saharansari]

If I follow that rules of
'este/esta/isto/deste/desta/neste/nesta =THIS'
and
Isso/esse/essa/desse/dessa/disso/nesse/nessa I would naturally assume NISSO =That

Which is the given form in the hint too, hence, is this a bug - or am i confused?