The hit-making Broadway writing team of Julia Houston and Tom Levitt unites with producer Eileen Rand to create a new musical based on the life of Marilyn Monroe, and seasoned chorus girl Ivy Lynn vies with newcomer Karen Cartwright for the dream role.

Ivy and Karen jump through hoops for the brilliant but temperamental director Derek Wills as they pursue the role of a lifetime. Meanwhile, Julia and her husband Frank, are frustrated by the red tape of an international adoption process, and Eileen fights to finance her new musical in the midst of an acrimonious divorce.

The search begins for a Joe DiMaggio to play opposite Marilyn - but everyone's first choice, Michael, has a secret. Karen returns to Iowa for a baby shower and must decide what she wants for her future. Eileen begins rounding up investors - but ex-husband Jerry may already have poisoned the well.

Karen must learn to advance in the high-stakes world of Broadway, as Derek hosts a party for hot young star Lyle. Eileen tries a sly new strategy for raising funds, while Tom goes on a first date.

Karen finds a new use for her acting talents as she joins Dev at a high-powered government party. The drama between Michael and Julia heats up, as Eileen and Tom's ambitious assistant Ellis forge an alliance. Ivy senses trouble in her relationship with Derek.

Julia is struggling to avoid Michael while, Eileen and Ellis' friendship continues to grow as they hang out at a local downtown dive bar. Also, Karen books a side job at a bar and Ivy's starts to have issues with her voice.

It's time for the team to present ''Marilyn the Musical'' to possible investors however, Ivy struggles to perform and Karen must make a difficult decision. Meanwhile, Julia and Michael must face up to the consequences of their actions.

As the team deals with the fallout of the workshop, Eileen is forced to deal with her estranged husband as her daughter pays a surprise visit. While, Derek asks Karen to help him steal the show away from Tom and Julia.

Ivy and Karen once again go head to head as they compete for an orange juice commercial. While, Tom and Julia work on coming up with a new title for the newly reinvigorated musical.

As Tom and Julia celebrate their anniversary, Marilyn's new leading lady Rebecca Duvall gets stranded in Cuba which, leads to Derek asking Karen to fill in.

\"Bombshell\" is turned upside-down by the arrival of movie star Rebecca Duvall. Karen and Ivy are drawn into an uneasy alliance against their new rival - but can they overcome their history? The romance between Tom and Sam heats up, while Julia and Frank must put aside their differences to address a family crisis. Dev faces a big decision.

Karen finds herself seduced by the glamorous life of new BFF Rebecca Duvall - but can Rebecca be trusted? What will Karen\'s ascent mean to her relationship with Dev? And will Rebecca drive Derek insane? Eileen introduces new beau Nick to ex-husband Jerry, while Julia panics when her son Leo goes missing.

Ivy faces trouble as Derek finds himself drawn ever closer to Rebecca Duvall, while Karen reaches a turning point - she must choose between Dev and the show. Eileen faces off against Julia over the possible return of Michael Swift.

\"Bombshell\" faces its first audience just as a major crisis hits Rebecca Duvall. The team of Tom and Julia scramble to fix the show when the first preview falls short, and Frank must adjust to the unwelcome return of Michael Swift to his life. Dev seeks reconciliation with Karen, but explosive information about Ivy lurks just beneath the surface.

The big night is finally here. Tom and Julia race against time to save the show, while Derek makes a decision that will change the lives of Karen and Ivy forever. Ellis reveals his true colors. But when he finally makes his move to save "Bombshell," will it be for or against Eileen? In the midst of it all, another bombshell goes off - this one is in Karen and Dev's relationship.