Luke said that just then (καὶ ἰδοὺ), some men came carrying a paralyzed man on a bed or mat (ἄνδρες φέροντες ἐπὶ κλίνης ἄνθρωπον ὃς ἦν παραλελυμένος). They were trying to bring him into the house (καὶ ἐζήτουν αὐτὸν εἰσενεγκεῖν). They wanted to lay him before Jesus (καὶ θεῖναι ἐνώπιον αὐτοῦ). Mark, chapter 2:2-3, and Matthew, chapter 9:2, have something similar. Mark said that so many people gathered around Jesus’ house that there was no longer room or space for them there, not even in front of the door. Jesus was preaching the word to them. Only Mark mentioned that 4 men were carrying a paralyzed man. Matthew simply said that some people brought this paralyzed man to Jesus on a bed. They were trying to bring a paralyzed man for Jesus to cure him.
This is unique to Mark, but not unusual. Mark said that so many people gathered around his house (καὶ συνήχθησαν πολλοὶ) that there was no longer room or space for them there (ὥστε μηκέτι χωρεῖν), not even in front of the door (μηδὲ τὰ πρὸς τὴν θύραν). He was preaching the word to them (καὶ ἐλάλει αὐτοῖς τὸν λόγον). Once again, there was not a specific message here in Mark, just the word in general.