A night of flirting and drinking leads up to House of Darkness’ initial scene, featuring a coy couple exchanging smiles as Hap (Justin Long) anticipates more canoodling with Mina (Kate Bosworth) at her place.  She invites him in and, immediately, he can’t believe her house which resembles a castle-style mansion.  For some reason, he shrugs off the peculiar detail that it’s lit by several candlesticks and that Mina is dressed for a long-ago period, but…