Takes place before Season 3 and after Season 2

After an accident resulting in Rainbow Dash's abrupt and unexpected death, Twilight becomes fascinated with a new discovery: Rainbow Dash's love affair with an unknown individual. Using only her wits and a diary left behind by her newly departed friend, Twilight feels it is only necessary to find this individual and give them the bad news.

With the six friends still remaining, can Twilight uncover why Dash had been hiding this from them for so long or will it just lead to more secrets and lies she had wished she hadn't heard?