The crew of Ragnar will have to deal with a major mess in the upcoming episode of "Vikings" season 4.

According to reports, Ragnar's fleet will be shipwrecked somewhere on the Wessex coast. The disaster will reportedly cause Ragnar and Ivar to come up with a tough decision. Elsewhere in the episode, Rollo will risk his marriage and new identity to join Bjorn as he sets out on his new voyage.

It can be recalled that in episode 12 titled "The Vision," Ragnar sailed to Wessex in England together with old locals whom he bribed with treasure despite Aslaug's previous warning. Aslaug had to warn Ragnar because he had a vision of Ivar drowning. He told them that they would only risk their lives if they would sail to Wessex.

According to reports, Ragnar and Ivar will be compelled to make a difficult choice in episode 13 as all their three ships get wrecked and washed up on the coast of Wessex. Unfortunately, there will not be enough survivors to form a force that is strong enough to make it through.

The synopsis for the episode also reveals that Rollo will not be able to resist joining Bjorn in his voyage. In the preview for episode 13, Bjorn is shown telling Rollo about his plan. Rollo then tells Bjorn that he will only agree if he lets him join his voyage.

Meanwhile, the preview for the episode also suggests that Lagertha will lead an uprising.

"Vikings" season 4, episode 13, titled "Two Journeys" airs on December 14, 9:00 P.M. on History. Watch the promo below.