Police devise a controversial honeytrap to catch the suspected killer of a young mother.

The honeytrap gains momentum as suspect Colin Stagg falls for covert officer 'Lizzie'.

'Lizzie' meets Colin face-to-face. But the pressure she's under starts to take its toll.

While Colin Stagg is on remand in prison, another horrific murder occurs with some clear similarities. Is Stagg in fact an entirely innocent man?