When 20 friends and acquaintances get together for a neighborhood party, no one expects that they are to become overnight millionaires. Two couples' relationships will be tested as their newfound wealth will change their lives forever. A stranger in their circle is Sean Mathers, who finds winning the lottery a threat to exposing his secret past.

When a rebellious teen wins, he is set free from his over-bearing parents. Meanwhile, one struggling, single mom will find herself out of debt and out of her trailer park when she hits it big.

A spontaneous shopping spree in Paris gives Beth and Nina time to spend time with each other without their husbands. Damien throws a big party and Frankie discovers that she's having romantic feelings for him. Zoe helps Sean in devising a plan to get a hold of the money - and to get away from his dangerous past. Kimberly discovers that her son Ethan's school needs help. Finally, a new character comes forth demanding a share of the winnings.

Sunny's claim for a share of the money freezes everyone's winnings, and Nina and Peter find themselves on opposite sides of the battle. Cameron's decision to take care of the baby without consulting Beth puts a strain on their marriage but a near-tragedy makes Beth change her mind. When it looks like Zoe might have skipped town with Sean's money, he finds a surprising - but reluctant - ally in her sister, Tally.

The news of Zoe's disappearance alarms all of the winners, especially when the police tell them they suspect that they are all targets now that they have won the lottery. Zoe's sister Tally decides to help Sean in his search for Zoe. To keep their dissolving marriages together, Cameron and Nina resist their attraction to each other. Nina is left alone to deal with the escrow of her family's new mansion when Peter leaves on an exclusive and expensive trip to Mexico after being invited by their new neighbor, but the trip is not what he was told it would be. Frankie feels out of place when her mother takes her on a vacation to New York, and becomes angry when she learns that they aren't on vacation, but are moving. Damien decides to help cheer Frankie up by surprising her in New York, but when he has to leave, Frankie makes a decision about her living situation.

Upon her return from New York, Frankie learns that her father has been involved in a shooting and taken into custody. It turns out that Sunny was the one in Frankie's father's house, and the bullet did nothug her. Nina and her children take Sunny home on their first night in the new mansion to help take care of her. Peter throws an extravagant party at the new mansion in hopes of finding new investors for his bicycle factory. Sean decides to hire a private investigator when he runs out of options trying to find Zoe. Damien finds himself torn between his growing feelings for Frankie and his attraction to his wife.

The tragedy of losing Zoe brings Sean and Tally closer together, but things soon get complicated when they learn that Tally will inherit her sister's possessions - including Sean's winnings. Peter is forced to look for a new investor when he clashes with some of the partners over how to run the bicycle factory. Cameron confesses a past mistake to Beth, leaving her wonder whether their marriage is worth saving. Meanwhile, Frankie hangs out with her bodyguard in New York, and with Galina still in custody, Damien snoops around in her stuff looking for clues about her dishonesty.

Peter flies off to Europe to sign a big advertising deal for the factory with his new partner, Sunny. Nina finds comfort in Cameron after he has to struggle with her two restless kids while waiting in the hospital after one of her daughters takes ill. Damien searches for a way to prevent Galina from getting deported after their divorce is finalized. Huge sums of money is found to be missing from Zoe's accounts by Tally and Sean.

To celebrate the unveiling of the company's new bicycle model, Peter and Sunny throw a huge party. After being treated coldly by their spouses, Cameron and Nina look for comfort in each other. Frankie tries to convince her mother to move away from New York, while Damien moves back home. Kimberly and Beth bump into one another and valuable advice is exchanged. Meanwhile, the truth about Zoe's disappearance is still being investigated by Sean and Tally.

Hardships at the office bring Peter and Sunny closer together when they must deal with the allegations that a biker sponsored by the company has been using illegal drugs. Nina's attraction to Cameron is distracting her ability to make preparations for the kids' school play. Damien and Frankie go on a road trip, and Beth meets a French chef at Maggie's restaurant. Meanwhile, Sean is still looking for clues about Zoe while Tally is ready to give up the search.

After they are questioned in connection with Zoe's passing, Sean and Tally run from the law. Peter forces his protégé Colin Evett to make a life-and-passing decision about his career, while Nina and Cameron plan for a future together. Galina is pressured by Damien to sign the divorce papers and adoption options are researched by Beth.

After Nina and Cameron's affair is revealed, Peter finds himself looking for comfort in Sunny. Sean presses the truth out of Tally. Maggie throws an engagement party for her brother Ramon and his gorgeous fiancée but gets suspicious about her motives for marriage. Damien continues to push forward his divorce from Galina but agrees to help her when he finds she's gotten herself in trouble with a married man.

Sunny reveals a personal secret to Peter after feeling closer to him while spending the night together. The Schaefer girls are hit harder than expected when they hear news of their parents' separation. Galina and Damien try to work out what to do with the baby, while Frankie starts to fall for another boy. After being shot, Sean seeks Maggie's help - and she agrees to help him find evidence to incriminate Tally.

In the series finale, Peter makes a decision about his marriage. Beth receives good news from China, and Cameron begs her for a second chance. Damien finally makes a choice between Galina and Frankie. Frankie, however, gets disturbing news about her father. Sean is released from custody, but Tally not coming clean about Zoe's passing creates tension in their relationship. Meanwhile, Kimberly throws her son a birthday party - with some surprising guests.