In Deep is a gripping drama about two maverick undercover detectives who are sucked into the underworld of corruption, paedophilia, gang wars, prostitution and racism. Liam Ketman (Nick Berry) and Garth O'Hanlon (Stephen Tompkinson) spend their working lives assuming false identities in order to infiltrate the underbelly of society. Liam puts his life on the line with hard-core criminals while trying desperately to hold his marriage together. Garth, a loner, is determined to keep his personal life a mystery, even if it means compromising an investigation.