After the disastrous encounter at the Walsh family barbecue, Conor and Jock have one last chance to make Linda and Siobhan fall for them. They suggest to both girls that they should spend one full day with them, all four together, on what they hope will be a beautiful adventure, so that the girls can see just what they're missing out on. If they don't want to hang out with them after this day, then the lads will give up pursuing them. The girls, sensing an opportunity to rid themselves of the lads once and for all, agree to the suggestion. A sick day from school is the only way they can do this, leading to various difficulties for all four. Meanwhile, Mairead decides to invite a 'friend' over for dinner, which doesn't go down well with Conor. The special day begins with a clash - the lads haven't told the girls what their plans for the day are, so the girls arrive dressed to impress - not appropriate clothing to cycle on borrowed bikes around Cork for the day. The idea to stop off at the river for a spot of swimming goes down like a lead balloon with the girls. But the lads think that they'll win them over with their swimming skills, which attracts more attention than they bargained for. Things take an unexpected turn when Jock is reminded that the day is a poignant anniversary date, leaving the foursome needing to rally together and be supportive. Jock's sensitive side makes Siobhan think twice about her feelings for him. As the long day continues, attitudes are changed and warmer feelings develop, to the surprise of all.

Friendship, loyalty, laughter and lots of mischief bring best pals Conor MacSweeney and Jock O'Keeffe into ongoing conflict with their school headmaster, Principal Barry Walsh. Getting caught up in the chaos is Conor's long-suffering mother Mairead.

A not-so-clever plan to earn some extra cash backfires, bringing the lads head to head with Sergeant Healy, who has been hot on their heels for some time and is determined to catch them up to no good. They also may have been caught in the act by Principal Walsh's two daughters, Siobhan and Linda, so the lads need to turn on the charm to persuade the girls not to spill the beans, which only serves to further irritate Principal Walsh.

Local town bully Billy Murphy enters the fray as the lads have to approach him to avoid getting caught, leading to a hilarious stand-off. Conor and Jock have to rely on the strength of their friendship to see them through the clashes with the formidable team of Principal Walsh and Sergeant Healy, but not without the help of Mairead, who is unwittingly dragged into the proceedings to support her son and his friend.

Conor and Jock's friendships with Principal Walsh's daughters intensify, causing awkward tension between the lads, the Principal, and Linda and Siobhan themselves.