Loosely based on the gruesome case of the Lonely Hearts Killers, who murdered as many as 20 women in the 1940s, Alleluia is not for the faint-hearted. Gloria (Lola Dueñas, Volver), a single mother and morgue attendant, reluctantly goes on a dinner date with shoe salesman Michel (Laurent Lucas, In My Skin) after her friend sets up an online dating profile on her behalf. The nigh...