Helensburgh Thistle have to overturn a three-goal deficit to rescue their promotion dreams in tonight's second leg against Bellambi.
After being outclassed 4-1 by the Rosellas in Friday's opening leg, the Burgh are desperate to turn it around at J J Kelly Park.
"It is going to be tough, but not impossible," Helensburgh coach Matt Callahan said.
"After the performance on Friday night I am just looking for a good attitude to start off with.
"That is the best I can ask for.
"If you come out with a good attitude and play well at least we are a chance, but we just can't go into our shell."
Callahan's men got off to a sluggish start in Friday's clash, falling two goals behind in the opening 10 minutes.
Bellambi's Andrew Breslin then compounded the misery by scoring two more to put the Rosellas in the box seat for promotion.
"I think they shocked us," Callahan said.
"We never settled down and we made too many mistakes and were punished for them."
Those uncharacteristic errors could cost Thistle their chance of winning the two-game series on aggregate.
Nevertheless, Callahan is hoping his team's chances can be revived tonight by giving Bellambi a taste of their own medicine.
"If we score early it will really lift us and then we have to go on from there," Callahan said.
"We just have to get them in a negative frame of mind by starting well and making sure they don't get on a roll."