The 'Invisible People' exhibition is part of the National Crime Agency's campaign to raise awareness of modern slavery and human trafficking.
Slavery was abolished in the UK in 1807 yet more than 200 years on it still exists. Modern slavery is a crime which seeks out the most vulnerable men, women and children and abuses them for criminal profit.
Exploitation is in our communities. Sometimes it is right before our eyes and yet we don't really see it.
The exhibition comprises a series of large, freestanding cubes displaying images capturing snapshots of life in modern slavery - in agriculture, construction, maritime, cannabis farming and food processing, child trafficking for sexual exploitation and forced prostitution.
Ms Hernandez, who as PCC overseas the Government's £8.5m investment in the national modern slavery unit based at Exmouth, said "Given recent events in Cornwall this gives the general public a fantastic opportunity to get a sense of the effect these medieval practices have on vulnerable communities.
"There is more we can do to help our communities understand modern slavery and how it affects all of us and this fine exhibtion is good place for people to start their learning."
Chief Constable Shaun Sawyer, national policing lead for modern slavery, commented, "Modern slavery is an incredibly complex crime to unravel and it is vital that we increase the eyes an dears capable of recognising the sign of symptoms.
"The visual impact of this exhibition will provide a powerful illustration of modern slavery, which I am sure will assist in raising awareness of this abhorrent crim and lead to increased reporting."
You can see the free exhibition at the Piazza in Plymouth this weekend (10-11 February).