• "Grey's Anatomy" Season 13 is slated to make its return on ABC this fall on Sept. 22.

"Grey's Anatomy" Season 13 is slated to make its return on ABC this fall on Sept. 22. (Photo : ABC)

"Grey's Anatomy" Season 12 finale goes on air next week. Episode 24 titled "Family Affair" marks the end of an eventful season with a dramatic storyline. Here are the detailed spoilers for the final chapter of the twelfth season of the ABC's long-running drama. Read on to find out what happens next.

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[Spoiler alert! This article contains spoilers for "Grey's Anatomy" Season 12 episode 24 (finale) "Family Affair." Do not read further if you don't wish to know more about it.]

In the penultimate episode, Amelia and Owen take their relationship to a new level and talk about getting married. Meanwhile, Alex finds the answer to his proposal to Jo and Stephanie and Kyle resolve differences before Kyle dies. In the meantime, Callie and Arizona continue to deal with the consequences of their legal battle.

Moving on to "Grey's Anatomy" Season 12 episode 24. The network has released a detailed synopsis for finale "Family Affair" on its official website. According to the press release, the season finale will see Meredith and Maggie help Amelia on one of her most important days.

A promo video for "Grey's Anatomy" Season 12 episode 24 reveals that it is Amelia's wedding day.

"I am flipping out here," nervous Amelia tells Meredith in the trailer.

"I am here for you. Tell me what you want to do?" responds Meredith.

Elsewhere, at the wedding venue, April goes into labour pain and the only person she has on her side is Ben. Spoilers for the finale suggest that Ben will spring into action to help a friend. Will Ben take yet another risk which involves his co-worker and friend? It is going to be "one heck of a finale" teases the promo video. Scroll down to watch the trailer.

In addition, Callie and Arizona continue to deal with the fallout. They struggle to get used to the new custody arrangement but it may not be as easy as anticipated.

"Grey's Anatomy" Season 12 episode 24 (finale) airs May 19 at 8:00 pm on ABC. Stay tuned for more spoilers and updates.

Credit: YouTube.com/Grey's Anatomy - GreySloan