April, 1890. London wakes to the shocking news of a mass prison escape. The Scotland Yard Murder Squad now face a desperate race against time: if they don't re-capture the four convicted murderers before night settles, they'll vanish into the dark alleys of the London's criminal underworld for ever. And in the midst of this mayhem and fear, the city's worst nightmare is realised: Jack the Ripper haunts the streets of London once more…