Penryn lost their unbeaten league record away at Torquay on Saturday after an injury time penalty kick condemned them to a 26-24 defeat.
It was tough on the Borough, who more than matched their opponents in what was a real mud and guts game played in driving rain on the English riviera.
Alex Jeffrey's early penalty kick put Torquay into the lead, but it was Penryn who had the better of the opening 20 minutes despite not being able to score.
The home side pulled clear after Sam Fellows and Andy Gormley went over, with Jeffrey converting both.
But Penryn battled back, with Jake Seviour's brace of penalty kicks making it 17-6 at the break.
Colin Campbell dotted down for Penryn after the restart to further close the gap, but two more penalty kicks from Jeffrey provided Torquay with some breathing space.
With the game finely balanced, two more penalty kicks from Jeffrey looked to have put the game to bed, but Jake Seviour responded with another penalty for Penryn, before brother Andrew went over in the corner.
His converted try put Penryn into the lead, but another late Jeffrey penalty broke Borough hearts and secured the win for Torquay.
Elsewhere in Western Counties West, Truro were the day's big winners with a 48-0 hammering of Paignton Saxons.
New signing from Redruth, Ashley Lawton, bagged two tries as Truro completely outclassed their Devon opponents to register a much needed win.
Full Western Counties West results were as follows:
Bude 5 - 15 Wellington
Burnham-on-Sea 46 - 0 Tavistock
Devonport Services 26 - 51 Ivybridge
Kingsbridge 27 - 10 Okehampton
Teignmouth 45 - 3 St Ives (SW)
Torquay Athletic 26 - 24 Penryn
Truro 48 - 0 Paignton Saxons