Two local councillors will be drenched in freezing water as they take part in the latest online craze for charity.
Mayor Bill Nash and councillor Steve Gazzard will be filmed carrying out the stunt on the Strand at noon.
It's to raise money for their chosen charities, the Samaritans and the British Lung Foundation.
£500k for new homes for Torbay and Afghan families
More than 160 are in temporary accommodation
Government halts protection work on Dawlish mainline
'This is a massive blow'
Three people charged with attempted murder
Two men and a woman appearing at Plymouth Magistrates'
Body found in Cornish woodland
Death is suspicious
Costly Plymouth road project sparks council row
City growth vs. disruption
Police commissioner office borrows millions from fire service
The short-term loan was part of a wider £22.5 million in borrowing
